diff --git a/actix-http/src/body.rs b/actix-http/src/body.rs
index ff7235626..ecb12fc23 100644
--- a/actix-http/src/body.rs
+++ b/actix-http/src/body.rs
@@ -35,7 +35,7 @@ impl BodySize {
 pub trait MessageBody {
     fn size(&self) -> BodySize;
 
-    fn poll_next(&mut self, cx: &mut Context) -> Poll<Option<Result<Bytes, Error>>>;
+    fn poll_next(&mut self, cx: &mut Context<'_>) -> Poll<Option<Result<Bytes, Error>>>;
 }
 
 impl MessageBody for () {
@@ -43,7 +43,7 @@ impl MessageBody for () {
         BodySize::Empty
     }
 
-    fn poll_next(&mut self, _: &mut Context) -> Poll<Option<Result<Bytes, Error>>> {
+    fn poll_next(&mut self, _: &mut Context<'_>) -> Poll<Option<Result<Bytes, Error>>> {
         Poll::Ready(None)
     }
 }
@@ -53,7 +53,7 @@ impl<T: MessageBody> MessageBody for Box<T> {
         self.as_ref().size()
     }
 
-    fn poll_next(&mut self, cx: &mut Context) -> Poll<Option<Result<Bytes, Error>>> {
+    fn poll_next(&mut self, cx: &mut Context<'_>) -> Poll<Option<Result<Bytes, Error>>> {
         self.as_mut().poll_next(cx)
     }
 }
@@ -97,7 +97,7 @@ impl<B: MessageBody> MessageBody for ResponseBody<B> {
         }
     }
 
-    fn poll_next(&mut self, cx: &mut Context) -> Poll<Option<Result<Bytes, Error>>> {
+    fn poll_next(&mut self, cx: &mut Context<'_>) -> Poll<Option<Result<Bytes, Error>>> {
         match self {
             ResponseBody::Body(ref mut body) => body.poll_next(cx),
             ResponseBody::Other(ref mut body) => body.poll_next(cx),
@@ -109,7 +109,10 @@ impl<B: MessageBody> Stream for ResponseBody<B> {
     type Item = Result<Bytes, Error>;
 
     #[project]
-    fn poll_next(self: Pin<&mut Self>, cx: &mut Context) -> Poll<Option<Self::Item>> {
+    fn poll_next(
+        self: Pin<&mut Self>,
+        cx: &mut Context<'_>,
+    ) -> Poll<Option<Self::Item>> {
         #[project]
         match self.project() {
             ResponseBody::Body(ref mut body) => body.poll_next(cx),
@@ -152,7 +155,7 @@ impl MessageBody for Body {
         }
     }
 
-    fn poll_next(&mut self, cx: &mut Context) -> Poll<Option<Result<Bytes, Error>>> {
+    fn poll_next(&mut self, cx: &mut Context<'_>) -> Poll<Option<Result<Bytes, Error>>> {
         match self {
             Body::None => Poll::Ready(None),
             Body::Empty => Poll::Ready(None),
@@ -190,7 +193,7 @@ impl PartialEq for Body {
 }
 
 impl fmt::Debug for Body {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         match *self {
             Body::None => write!(f, "Body::None"),
             Body::Empty => write!(f, "Body::Empty"),
@@ -272,7 +275,7 @@ impl MessageBody for Bytes {
         BodySize::Sized(self.len())
     }
 
-    fn poll_next(&mut self, _: &mut Context) -> Poll<Option<Result<Bytes, Error>>> {
+    fn poll_next(&mut self, _: &mut Context<'_>) -> Poll<Option<Result<Bytes, Error>>> {
         if self.is_empty() {
             Poll::Ready(None)
         } else {
@@ -286,7 +289,7 @@ impl MessageBody for BytesMut {
         BodySize::Sized(self.len())
     }
 
-    fn poll_next(&mut self, _: &mut Context) -> Poll<Option<Result<Bytes, Error>>> {
+    fn poll_next(&mut self, _: &mut Context<'_>) -> Poll<Option<Result<Bytes, Error>>> {
         if self.is_empty() {
             Poll::Ready(None)
         } else {
@@ -300,7 +303,7 @@ impl MessageBody for &'static str {
         BodySize::Sized(self.len())
     }
 
-    fn poll_next(&mut self, _: &mut Context) -> Poll<Option<Result<Bytes, Error>>> {
+    fn poll_next(&mut self, _: &mut Context<'_>) -> Poll<Option<Result<Bytes, Error>>> {
         if self.is_empty() {
             Poll::Ready(None)
         } else {
@@ -316,7 +319,7 @@ impl MessageBody for &'static [u8] {
         BodySize::Sized(self.len())
     }
 
-    fn poll_next(&mut self, _: &mut Context) -> Poll<Option<Result<Bytes, Error>>> {
+    fn poll_next(&mut self, _: &mut Context<'_>) -> Poll<Option<Result<Bytes, Error>>> {
         if self.is_empty() {
             Poll::Ready(None)
         } else {
@@ -330,7 +333,7 @@ impl MessageBody for Vec<u8> {
         BodySize::Sized(self.len())
     }
 
-    fn poll_next(&mut self, _: &mut Context) -> Poll<Option<Result<Bytes, Error>>> {
+    fn poll_next(&mut self, _: &mut Context<'_>) -> Poll<Option<Result<Bytes, Error>>> {
         if self.is_empty() {
             Poll::Ready(None)
         } else {
@@ -344,7 +347,7 @@ impl MessageBody for String {
         BodySize::Sized(self.len())
     }
 
-    fn poll_next(&mut self, _: &mut Context) -> Poll<Option<Result<Bytes, Error>>> {
+    fn poll_next(&mut self, _: &mut Context<'_>) -> Poll<Option<Result<Bytes, Error>>> {
         if self.is_empty() {
             Poll::Ready(None)
         } else {
@@ -386,7 +389,7 @@ where
         BodySize::Stream
     }
 
-    fn poll_next(&mut self, cx: &mut Context) -> Poll<Option<Result<Bytes, Error>>> {
+    fn poll_next(&mut self, cx: &mut Context<'_>) -> Poll<Option<Result<Bytes, Error>>> {
         unsafe { Pin::new_unchecked(self) }
             .project()
             .stream
@@ -421,7 +424,7 @@ where
         BodySize::Sized64(self.size)
     }
 
-    fn poll_next(&mut self, cx: &mut Context) -> Poll<Option<Result<Bytes, Error>>> {
+    fn poll_next(&mut self, cx: &mut Context<'_>) -> Poll<Option<Result<Bytes, Error>>> {
         unsafe { Pin::new_unchecked(self) }
             .project()
             .stream
diff --git a/actix-http/src/client/connection.rs b/actix-http/src/client/connection.rs
index 9b590690f..566769c5e 100644
--- a/actix-http/src/client/connection.rs
+++ b/actix-http/src/client/connection.rs
@@ -63,7 +63,7 @@ impl<T> fmt::Debug for IoConnection<T>
 where
     T: fmt::Debug,
 {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         match self.io {
             Some(ConnectionType::H1(ref io)) => write!(f, "H1Connection({:?})", io),
             Some(ConnectionType::H2(_)) => write!(f, "H2Connection"),
@@ -247,7 +247,7 @@ where
     #[project]
     fn poll_write(
         self: Pin<&mut Self>,
-        cx: &mut Context,
+        cx: &mut Context<'_>,
         buf: &[u8],
     ) -> Poll<io::Result<usize>> {
         #[project]
diff --git a/actix-http/src/client/connector.rs b/actix-http/src/client/connector.rs
index c78597d01..a06afa7b0 100644
--- a/actix-http/src/client/connector.rs
+++ b/actix-http/src/client/connector.rs
@@ -62,7 +62,7 @@ trait Io: AsyncRead + AsyncWrite + Unpin {}
 impl<T: AsyncRead + AsyncWrite + Unpin> Io for T {}
 
 impl Connector<(), ()> {
-    #[allow(clippy::new_ret_no_self)]
+    #[allow(clippy::new_ret_no_self, clippy::let_unit_value)]
     pub fn new() -> Connector<
         impl Service<
                 Request = TcpConnect<Uri>,
@@ -378,7 +378,7 @@ mod connect_impl {
             Ready<Result<IoConnection<Io>, ConnectError>>,
         >;
 
-        fn poll_ready(&mut self, cx: &mut Context) -> Poll<Result<(), Self::Error>> {
+        fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
             self.tcp_pool.poll_ready(cx)
         }
 
@@ -451,7 +451,7 @@ mod connect_impl {
             InnerConnectorResponseB<T2, Io1, Io2>,
         >;
 
-        fn poll_ready(&mut self, cx: &mut Context) -> Poll<Result<(), Self::Error>> {
+        fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
             self.tcp_pool.poll_ready(cx)
         }
 
@@ -490,10 +490,10 @@ mod connect_impl {
     {
         type Output = Result<EitherConnection<Io1, Io2>, ConnectError>;
 
-        fn poll(self: Pin<&mut Self>, cx: &mut Context) -> Poll<Self::Output> {
+        fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
             Poll::Ready(
                 ready!(Pin::new(&mut self.get_mut().fut).poll(cx))
-                    .map(|res| EitherConnection::A(res)),
+                    .map(EitherConnection::A),
             )
         }
     }
@@ -519,10 +519,10 @@ mod connect_impl {
     {
         type Output = Result<EitherConnection<Io1, Io2>, ConnectError>;
 
-        fn poll(self: Pin<&mut Self>, cx: &mut Context) -> Poll<Self::Output> {
+        fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
             Poll::Ready(
                 ready!(Pin::new(&mut self.get_mut().fut).poll(cx))
-                    .map(|res| EitherConnection::B(res)),
+                    .map(EitherConnection::B),
             )
         }
     }
diff --git a/actix-http/src/client/h1proto.rs b/actix-http/src/client/h1proto.rs
index 048d3795c..db4dede71 100644
--- a/actix-http/src/client/h1proto.rs
+++ b/actix-http/src/client/h1proto.rs
@@ -234,7 +234,7 @@ impl<T: AsyncRead + AsyncWrite + Unpin + 'static> AsyncWrite for H1Connection<T>
 
     fn poll_shutdown(
         mut self: Pin<&mut Self>,
-        cx: &mut Context,
+        cx: &mut Context<'_>,
     ) -> Poll<Result<(), io::Error>> {
         Pin::new(self.io.as_mut().unwrap()).poll_shutdown(cx)
     }
@@ -255,7 +255,10 @@ impl<Io: ConnectionLifetime> PlStream<Io> {
 impl<Io: ConnectionLifetime> Stream for PlStream<Io> {
     type Item = Result<Bytes, PayloadError>;
 
-    fn poll_next(self: Pin<&mut Self>, cx: &mut Context) -> Poll<Option<Self::Item>> {
+    fn poll_next(
+        self: Pin<&mut Self>,
+        cx: &mut Context<'_>,
+    ) -> Poll<Option<Self::Item>> {
         let this = self.get_mut();
 
         match this.framed.as_mut().unwrap().next_item(cx)? {
diff --git a/actix-http/src/client/pool.rs b/actix-http/src/client/pool.rs
index ef5bd5965..0346c0614 100644
--- a/actix-http/src/client/pool.rs
+++ b/actix-http/src/client/pool.rs
@@ -93,7 +93,7 @@ where
     type Error = ConnectError;
     type Future = LocalBoxFuture<'static, Result<IoConnection<Io>, ConnectError>>;
 
-    fn poll_ready(&mut self, cx: &mut Context) -> Poll<Result<(), Self::Error>> {
+    fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
         self.0.poll_ready(cx)
     }
 
@@ -308,7 +308,7 @@ where
         (rx, token)
     }
 
-    fn acquire(&mut self, key: &Key, cx: &mut Context) -> Acquire<Io> {
+    fn acquire(&mut self, key: &Key, cx: &mut Context<'_>) -> Acquire<Io> {
         // check limits
         if self.limit > 0 && self.acquired >= self.limit {
             return Acquire::NotAvailable;
@@ -409,7 +409,7 @@ where
 {
     type Output = ();
 
-    fn poll(self: Pin<&mut Self>, cx: &mut Context) -> Poll<()> {
+    fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<()> {
         let this = self.get_mut();
 
         match Pin::new(&mut this.timeout).poll(cx) {
@@ -438,7 +438,7 @@ where
 {
     type Output = ();
 
-    fn poll(self: Pin<&mut Self>, cx: &mut Context) -> Poll<Self::Output> {
+    fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
         let this = unsafe { self.get_unchecked_mut() };
 
         let mut inner = this.inner.as_ref().borrow_mut();
@@ -545,7 +545,7 @@ where
 {
     type Output = ();
 
-    fn poll(self: Pin<&mut Self>, cx: &mut Context) -> Poll<Self::Output> {
+    fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
         let this = unsafe { self.get_unchecked_mut() };
 
         if let Some(ref mut h2) = this.h2 {
diff --git a/actix-http/src/cloneable.rs b/actix-http/src/cloneable.rs
index 18869c66d..90d198b9c 100644
--- a/actix-http/src/cloneable.rs
+++ b/actix-http/src/cloneable.rs
@@ -32,7 +32,7 @@ where
     type Error = T::Error;
     type Future = T::Future;
 
-    fn poll_ready(&mut self, cx: &mut Context) -> Poll<Result<(), Self::Error>> {
+    fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
         unsafe { &mut *self.0.as_ref().get() }.poll_ready(cx)
     }
 
diff --git a/actix-http/src/cookie/draft.rs b/actix-http/src/cookie/draft.rs
index 362133946..a2b039121 100644
--- a/actix-http/src/cookie/draft.rs
+++ b/actix-http/src/cookie/draft.rs
@@ -88,7 +88,7 @@ impl SameSite {
 }
 
 impl fmt::Display for SameSite {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         match *self {
             SameSite::Strict => write!(f, "Strict"),
             SameSite::Lax => write!(f, "Lax"),
diff --git a/actix-http/src/cookie/jar.rs b/actix-http/src/cookie/jar.rs
index cc67536c6..91af49320 100644
--- a/actix-http/src/cookie/jar.rs
+++ b/actix-http/src/cookie/jar.rs
@@ -307,7 +307,7 @@ impl CookieJar {
     /// // Delta contains two new cookies ("new", "yac") and a removal ("name").
     /// assert_eq!(jar.delta().count(), 3);
     /// ```
-    pub fn delta(&self) -> Delta {
+    pub fn delta(&self) -> Delta<'_> {
         Delta {
             iter: self.delta_cookies.iter(),
         }
@@ -343,7 +343,7 @@ impl CookieJar {
     ///     }
     /// }
     /// ```
-    pub fn iter(&self) -> Iter {
+    pub fn iter(&self) -> Iter<'_> {
         Iter {
             delta_cookies: self
                 .delta_cookies
@@ -386,7 +386,7 @@ impl CookieJar {
     /// assert!(jar.get("private").is_some());
     /// ```
     #[cfg(feature = "secure-cookies")]
-    pub fn private(&mut self, key: &Key) -> PrivateJar {
+    pub fn private(&mut self, key: &Key) -> PrivateJar<'_> {
         PrivateJar::new(self, key)
     }
 
@@ -424,7 +424,7 @@ impl CookieJar {
     /// assert!(jar.get("signed").is_some());
     /// ```
     #[cfg(feature = "secure-cookies")]
-    pub fn signed(&mut self, key: &Key) -> SignedJar {
+    pub fn signed(&mut self, key: &Key) -> SignedJar<'_> {
         SignedJar::new(self, key)
     }
 }
diff --git a/actix-http/src/cookie/mod.rs b/actix-http/src/cookie/mod.rs
index db8211427..cd150337d 100644
--- a/actix-http/src/cookie/mod.rs
+++ b/actix-http/src/cookie/mod.rs
@@ -110,7 +110,7 @@ impl CookieStr {
     /// # Panics
     ///
     /// Panics if `self` is an indexed string and `string` is None.
-    fn to_str<'s>(&'s self, string: Option<&'s Cow<str>>) -> &'s str {
+    fn to_str<'s>(&'s self, string: Option<&'s Cow<'_, str>>) -> &'s str {
         match *self {
             CookieStr::Indexed(i, j) => {
                 let s = string.expect(
@@ -742,7 +742,7 @@ impl<'c> Cookie<'c> {
         self.set_expires(time::now() + twenty_years);
     }
 
-    fn fmt_parameters(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt_parameters(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         if let Some(true) = self.http_only() {
             write!(f, "; HttpOnly")?;
         }
@@ -924,10 +924,10 @@ impl<'c> Cookie<'c> {
 /// let mut c = Cookie::new("my name", "this; value?");
 /// assert_eq!(&c.encoded().to_string(), "my%20name=this%3B%20value%3F");
 /// ```
-pub struct EncodedCookie<'a, 'c: 'a>(&'a Cookie<'c>);
+pub struct EncodedCookie<'a, 'c>(&'a Cookie<'c>);
 
 impl<'a, 'c: 'a> fmt::Display for EncodedCookie<'a, 'c> {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         // Percent-encode the name and value.
         let name = percent_encode(self.0.name().as_bytes(), USERINFO);
         let value = percent_encode(self.0.value().as_bytes(), USERINFO);
@@ -952,7 +952,7 @@ impl<'c> fmt::Display for Cookie<'c> {
     ///
     /// assert_eq!(&cookie.to_string(), "foo=bar; Path=/");
     /// ```
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         write!(f, "{}={}", self.name(), self.value())?;
         self.fmt_parameters(f)
     }
diff --git a/actix-http/src/cookie/parse.rs b/actix-http/src/cookie/parse.rs
index 42a2c1fcf..8c9d4b644 100644
--- a/actix-http/src/cookie/parse.rs
+++ b/actix-http/src/cookie/parse.rs
@@ -40,7 +40,7 @@ impl ParseError {
 }
 
 impl fmt::Display for ParseError {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         write!(f, "{}", self.as_str())
     }
 }
diff --git a/actix-http/src/cookie/secure/private.rs b/actix-http/src/cookie/secure/private.rs
index 6c16e94e8..f05e23800 100644
--- a/actix-http/src/cookie/secure/private.rs
+++ b/actix-http/src/cookie/secure/private.rs
@@ -10,7 +10,7 @@ use crate::cookie::{Cookie, CookieJar};
 
 // Keep these in sync, and keep the key len synced with the `private` docs as
 // well as the `KEYS_INFO` const in secure::Key.
-static ALGO: &'static Algorithm = &AES_256_GCM;
+static ALGO: &Algorithm = &AES_256_GCM;
 const NONCE_LEN: usize = 12;
 pub const KEY_LEN: usize = 32;
 
@@ -159,7 +159,7 @@ Please change it as soon as possible."
 
     /// Encrypts the cookie's value with
     /// authenticated encryption assuring confidentiality, integrity, and authenticity.
-    fn encrypt_cookie(&self, cookie: &mut Cookie) {
+    fn encrypt_cookie(&self, cookie: &mut Cookie<'_>) {
         let name = cookie.name().as_bytes();
         let value = cookie.value().as_bytes();
         let data = encrypt_name_value(name, value, &self.key);
diff --git a/actix-http/src/cookie/secure/signed.rs b/actix-http/src/cookie/secure/signed.rs
index 3fcd2cd84..64e8d5dda 100644
--- a/actix-http/src/cookie/secure/signed.rs
+++ b/actix-http/src/cookie/secure/signed.rs
@@ -129,7 +129,7 @@ impl<'a> SignedJar<'a> {
     }
 
     /// Signs the cookie's value assuring integrity and authenticity.
-    fn sign_cookie(&self, cookie: &mut Cookie) {
+    fn sign_cookie(&self, cookie: &mut Cookie<'_>) {
         let digest = sign(&self.key, cookie.value().as_bytes());
         let mut new_value = base64::encode(digest.as_ref());
         new_value.push_str(cookie.value());
diff --git a/actix-http/src/encoding/decoder.rs b/actix-http/src/encoding/decoder.rs
index 90199b4f7..35be2d13c 100644
--- a/actix-http/src/encoding/decoder.rs
+++ b/actix-http/src/encoding/decoder.rs
@@ -78,7 +78,7 @@ where
 
     fn poll_next(
         mut self: Pin<&mut Self>,
-        cx: &mut Context,
+        cx: &mut Context<'_>,
     ) -> Poll<Option<Self::Item>> {
         loop {
             if let Some(ref mut fut) = self.fut {
diff --git a/actix-http/src/encoding/encoder.rs b/actix-http/src/encoding/encoder.rs
index d06762787..f8f996ff1 100644
--- a/actix-http/src/encoding/encoder.rs
+++ b/actix-http/src/encoding/encoder.rs
@@ -95,7 +95,7 @@ impl<B: MessageBody> MessageBody for Encoder<B> {
         }
     }
 
-    fn poll_next(&mut self, cx: &mut Context) -> Poll<Option<Result<Bytes, Error>>> {
+    fn poll_next(&mut self, cx: &mut Context<'_>) -> Poll<Option<Result<Bytes, Error>>> {
         loop {
             if self.eof {
                 return Poll::Ready(None);
@@ -176,7 +176,7 @@ enum ContentEncoder {
     Deflate(ZlibEncoder<Writer>),
     #[cfg(any(feature = "flate2-zlib", feature = "flate2-rust"))]
     Gzip(GzEncoder<Writer>),
-    Br(CompressorWriter<Writer>),
+    Br(Box<CompressorWriter<Writer>>),
 }
 
 impl ContentEncoder {
@@ -192,11 +192,8 @@ impl ContentEncoder {
                 Writer::new(),
                 flate2::Compression::fast(),
             ))),
-            ContentEncoding::Br => Some(ContentEncoder::Br(CompressorWriter::new(
-                Writer::new(),
-                0,
-                3,
-                0,
+            ContentEncoding::Br => Some(ContentEncoder::Br(Box::new(
+                CompressorWriter::new(Writer::new(), 0, 3, 0),
             ))),
             _ => None,
         }
@@ -206,7 +203,8 @@ impl ContentEncoder {
     pub(crate) fn take(&mut self) -> Bytes {
         match *self {
             ContentEncoder::Br(ref mut encoder) => {
-                let mut encoder_new = CompressorWriter::new(Writer::new(), 0, 3, 0);
+                let mut encoder_new =
+                    Box::new(CompressorWriter::new(Writer::new(), 0, 3, 0));
                 std::mem::swap(encoder, &mut encoder_new);
                 encoder_new.into_inner().freeze()
             }
diff --git a/actix-http/src/error.rs b/actix-http/src/error.rs
index ec56900fc..1dca55902 100644
--- a/actix-http/src/error.rs
+++ b/actix-http/src/error.rs
@@ -102,13 +102,13 @@ impl dyn ResponseError + 'static {
 }
 
 impl fmt::Display for Error {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         fmt::Display::fmt(&self.cause, f)
     }
 }
 
 impl fmt::Debug for Error {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         writeln!(f, "{:?}", &self.cause)
     }
 }
@@ -515,7 +515,7 @@ impl<T> fmt::Debug for InternalError<T>
 where
     T: fmt::Debug + 'static,
 {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         fmt::Debug::fmt(&self.cause, f)
     }
 }
@@ -524,7 +524,7 @@ impl<T> fmt::Display for InternalError<T>
 where
     T: fmt::Display + 'static,
 {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         fmt::Display::fmt(&self.cause, f)
     }
 }
diff --git a/actix-http/src/extensions.rs b/actix-http/src/extensions.rs
index 066e0a3ca..d85ca184d 100644
--- a/actix-http/src/extensions.rs
+++ b/actix-http/src/extensions.rs
@@ -65,7 +65,7 @@ impl Extensions {
 }
 
 impl fmt::Debug for Extensions {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         f.debug_struct("Extensions").finish()
     }
 }
diff --git a/actix-http/src/h1/codec.rs b/actix-http/src/h1/codec.rs
index 22c7ed232..726d1c97f 100644
--- a/actix-http/src/h1/codec.rs
+++ b/actix-http/src/h1/codec.rs
@@ -49,7 +49,7 @@ impl Default for Codec {
 }
 
 impl fmt::Debug for Codec {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         write!(f, "h1::Codec({:?})", self.flags)
     }
 }
diff --git a/actix-http/src/h1/decoder.rs b/actix-http/src/h1/decoder.rs
index 32ec64ba3..87e2a1ec8 100644
--- a/actix-http/src/h1/decoder.rs
+++ b/actix-http/src/h1/decoder.rs
@@ -185,6 +185,7 @@ impl MessageType for Request {
         &mut self.head_mut().headers
     }
 
+    #[allow(clippy::uninit_assumed_init)]
     fn decode(src: &mut BytesMut) -> Result<Option<(Self, PayloadType)>, ParseError> {
         // Unsafe: we read only this data only after httparse parses headers into.
         // performance bump for pipeline benchmarks.
@@ -192,7 +193,7 @@ impl MessageType for Request {
             unsafe { MaybeUninit::uninit().assume_init() };
 
         let (len, method, uri, ver, h_len) = {
-            let mut parsed: [httparse::Header; MAX_HEADERS] =
+            let mut parsed: [httparse::Header<'_>; MAX_HEADERS] =
                 unsafe { MaybeUninit::uninit().assume_init() };
 
             let mut req = httparse::Request::new(&mut parsed);
@@ -260,6 +261,7 @@ impl MessageType for ResponseHead {
         &mut self.headers
     }
 
+    #[allow(clippy::uninit_assumed_init)]
     fn decode(src: &mut BytesMut) -> Result<Option<(Self, PayloadType)>, ParseError> {
         // Unsafe: we read only this data only after httparse parses headers into.
         // performance bump for pipeline benchmarks.
@@ -267,7 +269,7 @@ impl MessageType for ResponseHead {
             unsafe { MaybeUninit::uninit().assume_init() };
 
         let (len, ver, status, h_len) = {
-            let mut parsed: [httparse::Header; MAX_HEADERS] =
+            let mut parsed: [httparse::Header<'_>; MAX_HEADERS] =
                 unsafe { MaybeUninit::uninit().assume_init() };
 
             let mut res = httparse::Response::new(&mut parsed);
@@ -326,7 +328,7 @@ pub(crate) struct HeaderIndex {
 impl HeaderIndex {
     pub(crate) fn record(
         bytes: &[u8],
-        headers: &[httparse::Header],
+        headers: &[httparse::Header<'_>],
         indices: &mut [HeaderIndex],
     ) {
         let bytes_ptr = bytes.as_ptr() as usize;
diff --git a/actix-http/src/h1/dispatcher.rs b/actix-http/src/h1/dispatcher.rs
index 0e2a58346..7276d5a38 100644
--- a/actix-http/src/h1/dispatcher.rs
+++ b/actix-http/src/h1/dispatcher.rs
@@ -264,7 +264,7 @@ where
     U: Service<Request = (Request, Framed<T, Codec>), Response = ()>,
     U::Error: fmt::Display,
 {
-    fn can_read(&self, cx: &mut Context) -> bool {
+    fn can_read(&self, cx: &mut Context<'_>) -> bool {
         if self
             .flags
             .intersects(Flags::READ_DISCONNECT | Flags::UPGRADE)
@@ -290,7 +290,7 @@ where
     ///
     /// true - got whouldblock
     /// false - didnt get whouldblock
-    fn poll_flush(&mut self, cx: &mut Context) -> Result<bool, DispatchError> {
+    fn poll_flush(&mut self, cx: &mut Context<'_>) -> Result<bool, DispatchError> {
         if self.write_buf.is_empty() {
             return Ok(false);
         }
@@ -355,7 +355,7 @@ where
 
     fn poll_response(
         &mut self,
-        cx: &mut Context,
+        cx: &mut Context<'_>,
     ) -> Result<PollResponse, DispatchError> {
         loop {
             let state = match self.state {
@@ -459,7 +459,7 @@ where
     fn handle_request(
         &mut self,
         req: Request,
-        cx: &mut Context,
+        cx: &mut Context<'_>,
     ) -> Result<State<S, B, X>, DispatchError> {
         // Handle `EXPECT: 100-Continue` header
         let req = if req.head().expect() {
@@ -500,7 +500,7 @@ where
     /// Process one incoming requests
     pub(self) fn poll_request(
         &mut self,
-        cx: &mut Context,
+        cx: &mut Context<'_>,
     ) -> Result<bool, DispatchError> {
         // limit a mount of non processed requests
         if self.messages.len() >= MAX_PIPELINED_MESSAGES || !self.can_read(cx) {
@@ -604,7 +604,7 @@ where
     }
 
     /// keep-alive timer
-    fn poll_keepalive(&mut self, cx: &mut Context) -> Result<(), DispatchError> {
+    fn poll_keepalive(&mut self, cx: &mut Context<'_>) -> Result<(), DispatchError> {
         if self.ka_timer.is_none() {
             // shutdown timeout
             if self.flags.contains(Flags::SHUTDOWN) {
@@ -710,7 +710,7 @@ where
     type Output = Result<(), DispatchError>;
 
     #[inline]
-    fn poll(mut self: Pin<&mut Self>, cx: &mut Context) -> Poll<Self::Output> {
+    fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
         match self.as_mut().inner {
             DispatcherState::Normal(ref mut inner) => {
                 inner.poll_keepalive(cx)?;
@@ -832,7 +832,7 @@ where
 }
 
 fn read_available<T>(
-    cx: &mut Context,
+    cx: &mut Context<'_>,
     io: &mut T,
     buf: &mut BytesMut,
 ) -> Result<Option<bool>, io::Error>
@@ -874,7 +874,7 @@ where
 }
 
 fn read<T>(
-    cx: &mut Context,
+    cx: &mut Context<'_>,
     io: &mut T,
     buf: &mut BytesMut,
 ) -> Poll<Result<usize, io::Error>>
diff --git a/actix-http/src/h1/expect.rs b/actix-http/src/h1/expect.rs
index 109491bac..187999358 100644
--- a/actix-http/src/h1/expect.rs
+++ b/actix-http/src/h1/expect.rs
@@ -28,7 +28,7 @@ impl Service for ExpectHandler {
     type Error = Error;
     type Future = Ready<Result<Self::Response, Self::Error>>;
 
-    fn poll_ready(&mut self, _: &mut Context) -> Poll<Result<(), Self::Error>> {
+    fn poll_ready(&mut self, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
         Poll::Ready(Ok(()))
     }
 
diff --git a/actix-http/src/h1/payload.rs b/actix-http/src/h1/payload.rs
index 46f2f9728..abf42dc89 100644
--- a/actix-http/src/h1/payload.rs
+++ b/actix-http/src/h1/payload.rs
@@ -82,7 +82,7 @@ impl Payload {
     #[inline]
     pub fn readany(
         &mut self,
-        cx: &mut Context,
+        cx: &mut Context<'_>,
     ) -> Poll<Option<Result<Bytes, PayloadError>>> {
         self.inner.borrow_mut().readany(cx)
     }
@@ -93,7 +93,7 @@ impl Stream for Payload {
 
     fn poll_next(
         self: Pin<&mut Self>,
-        cx: &mut Context,
+        cx: &mut Context<'_>,
     ) -> Poll<Option<Result<Bytes, PayloadError>>> {
         self.inner.borrow_mut().readany(cx)
     }
@@ -127,7 +127,7 @@ impl PayloadSender {
     }
 
     #[inline]
-    pub fn need_read(&self, cx: &mut Context) -> PayloadStatus {
+    pub fn need_read(&self, cx: &mut Context<'_>) -> PayloadStatus {
         // we check need_read only if Payload (other side) is alive,
         // otherwise always return true (consume payload)
         if let Some(shared) = self.inner.upgrade() {
@@ -194,7 +194,7 @@ impl Inner {
 
     fn readany(
         &mut self,
-        cx: &mut Context,
+        cx: &mut Context<'_>,
     ) -> Poll<Option<Result<Bytes, PayloadError>>> {
         if let Some(data) = self.items.pop_front() {
             self.len -= data.len();
diff --git a/actix-http/src/h1/service.rs b/actix-http/src/h1/service.rs
index d6494b5cb..6d5123843 100644
--- a/actix-http/src/h1/service.rs
+++ b/actix-http/src/h1/service.rs
@@ -324,7 +324,7 @@ where
 {
     type Output = Result<H1ServiceHandler<T, S::Service, B, X::Service, U::Service>, ()>;
 
-    fn poll(mut self: Pin<&mut Self>, cx: &mut Context) -> Poll<Self::Output> {
+    fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
         let mut this = self.as_mut().project();
 
         if let Some(fut) = this.fut_ex.as_pin_mut() {
@@ -419,7 +419,7 @@ where
     type Error = DispatchError;
     type Future = Dispatcher<T, S, B, X, U>;
 
-    fn poll_ready(&mut self, cx: &mut Context) -> Poll<Result<(), Self::Error>> {
+    fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
         let ready = self
             .expect
             .poll_ready(cx)
@@ -523,7 +523,7 @@ where
     type Error = ParseError;
     type Future = OneRequestServiceResponse<T>;
 
-    fn poll_ready(&mut self, _: &mut Context) -> Poll<Result<(), Self::Error>> {
+    fn poll_ready(&mut self, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
         Poll::Ready(Ok(()))
     }
 
@@ -548,7 +548,7 @@ where
 {
     type Output = Result<(Request, Framed<T, Codec>), ParseError>;
 
-    fn poll(mut self: Pin<&mut Self>, cx: &mut Context) -> Poll<Self::Output> {
+    fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
         match self.framed.as_mut().unwrap().next_item(cx) {
             Poll::Ready(Some(Ok(req))) => match req {
                 Message::Item(req) => {
diff --git a/actix-http/src/h1/upgrade.rs b/actix-http/src/h1/upgrade.rs
index e3ce66521..d02d4f075 100644
--- a/actix-http/src/h1/upgrade.rs
+++ b/actix-http/src/h1/upgrade.rs
@@ -31,7 +31,7 @@ impl<T> Service for UpgradeHandler<T> {
     type Error = Error;
     type Future = Ready<Result<Self::Response, Self::Error>>;
 
-    fn poll_ready(&mut self, _: &mut Context) -> Poll<Result<(), Self::Error>> {
+    fn poll_ready(&mut self, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
         Poll::Ready(Ok(()))
     }
 
diff --git a/actix-http/src/h1/utils.rs b/actix-http/src/h1/utils.rs
index 7af0b124e..9ba4aa053 100644
--- a/actix-http/src/h1/utils.rs
+++ b/actix-http/src/h1/utils.rs
@@ -39,7 +39,7 @@ where
 {
     type Output = Result<Framed<T, Codec>, Error>;
 
-    fn poll(self: Pin<&mut Self>, cx: &mut Context) -> Poll<Self::Output> {
+    fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
         let this = self.get_mut();
 
         loop {
diff --git a/actix-http/src/h2/dispatcher.rs b/actix-http/src/h2/dispatcher.rs
index 707ac7b9d..b827762cb 100644
--- a/actix-http/src/h2/dispatcher.rs
+++ b/actix-http/src/h2/dispatcher.rs
@@ -106,7 +106,7 @@ where
     type Output = Result<(), DispatchError>;
 
     #[inline]
-    fn poll(self: Pin<&mut Self>, cx: &mut Context) -> Poll<Self::Output> {
+    fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
         let this = self.get_mut();
 
         loop {
@@ -252,7 +252,7 @@ where
 {
     type Output = ();
 
-    fn poll(mut self: Pin<&mut Self>, cx: &mut Context) -> Poll<Self::Output> {
+    fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
         let mut this = self.as_mut().project();
 
         match this.state {
diff --git a/actix-http/src/h2/mod.rs b/actix-http/src/h2/mod.rs
index 28dd75383..21080c69a 100644
--- a/actix-http/src/h2/mod.rs
+++ b/actix-http/src/h2/mod.rs
@@ -29,7 +29,10 @@ impl Payload {
 impl Stream for Payload {
     type Item = Result<Bytes, PayloadError>;
 
-    fn poll_next(self: Pin<&mut Self>, cx: &mut Context) -> Poll<Option<Self::Item>> {
+    fn poll_next(
+        self: Pin<&mut Self>,
+        cx: &mut Context<'_>,
+    ) -> Poll<Option<Self::Item>> {
         let this = self.get_mut();
 
         match Pin::new(&mut this.pl).poll_data(cx) {
diff --git a/actix-http/src/h2/service.rs b/actix-http/src/h2/service.rs
index 1bacc5c95..cdef71c57 100644
--- a/actix-http/src/h2/service.rs
+++ b/actix-http/src/h2/service.rs
@@ -235,7 +235,7 @@ where
 {
     type Output = Result<H2ServiceHandler<T, S::Service, B>, S::InitError>;
 
-    fn poll(mut self: Pin<&mut Self>, cx: &mut Context) -> Poll<Self::Output> {
+    fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
         let this = self.as_mut().project();
 
         Poll::Ready(ready!(this.fut.poll(cx)).map(|service| {
@@ -293,7 +293,7 @@ where
     type Error = DispatchError;
     type Future = H2ServiceHandlerResponse<T, S, B>;
 
-    fn poll_ready(&mut self, cx: &mut Context) -> Poll<Result<(), Self::Error>> {
+    fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
         self.srv.poll_ready(cx).map_err(|e| {
             let e = e.into();
             error!("Service readiness error: {:?}", e);
@@ -358,7 +358,7 @@ where
 {
     type Output = Result<(), DispatchError>;
 
-    fn poll(mut self: Pin<&mut Self>, cx: &mut Context) -> Poll<Self::Output> {
+    fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
         match self.state {
             State::Incoming(ref mut disp) => Pin::new(disp).poll(cx),
             State::Handshake(
diff --git a/actix-http/src/header/common/cache_control.rs b/actix-http/src/header/common/cache_control.rs
index a3253b85b..ec94ce4a9 100644
--- a/actix-http/src/header/common/cache_control.rs
+++ b/actix-http/src/header/common/cache_control.rs
@@ -74,7 +74,7 @@ impl Header for CacheControl {
 }
 
 impl fmt::Display for CacheControl {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         fmt_comma_delimited(f, &self[..])
     }
 }
@@ -126,7 +126,7 @@ pub enum CacheDirective {
 }
 
 impl fmt::Display for CacheDirective {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         use self::CacheDirective::*;
         fmt::Display::fmt(
             match *self {
diff --git a/actix-http/src/header/common/content_disposition.rs b/actix-http/src/header/common/content_disposition.rs
index d09024f3f..d0d5af765 100644
--- a/actix-http/src/header/common/content_disposition.rs
+++ b/actix-http/src/header/common/content_disposition.rs
@@ -486,7 +486,7 @@ impl Header for ContentDisposition {
 }
 
 impl fmt::Display for DispositionType {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         match self {
             DispositionType::Inline => write!(f, "inline"),
             DispositionType::Attachment => write!(f, "attachment"),
@@ -497,7 +497,7 @@ impl fmt::Display for DispositionType {
 }
 
 impl fmt::Display for DispositionParam {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         // All ASCII control characters (0-30, 127) including horizontal tab, double quote, and
         // backslash should be escaped in quoted-string (i.e. "foobar").
         // Ref: RFC6266 S4.1 -> RFC2616 S3.6
@@ -555,7 +555,7 @@ impl fmt::Display for DispositionParam {
 }
 
 impl fmt::Display for ContentDisposition {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         write!(f, "{}", self.disposition)?;
         self.parameters
             .iter()
diff --git a/actix-http/src/header/common/content_range.rs b/actix-http/src/header/common/content_range.rs
index a3e4d49ba..9a604c641 100644
--- a/actix-http/src/header/common/content_range.rs
+++ b/actix-http/src/header/common/content_range.rs
@@ -166,7 +166,7 @@ impl FromStr for ContentRangeSpec {
 }
 
 impl Display for ContentRangeSpec {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         match *self {
             ContentRangeSpec::Bytes {
                 range,
diff --git a/actix-http/src/header/common/if_range.rs b/actix-http/src/header/common/if_range.rs
index ea5d69a13..b14ad0391 100644
--- a/actix-http/src/header/common/if_range.rs
+++ b/actix-http/src/header/common/if_range.rs
@@ -87,7 +87,7 @@ impl Header for IfRange {
 }
 
 impl Display for IfRange {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         match *self {
             IfRange::EntityTag(ref x) => Display::fmt(x, f),
             IfRange::Date(ref x) => Display::fmt(x, f),
diff --git a/actix-http/src/header/common/mod.rs b/actix-http/src/header/common/mod.rs
index 814050b13..08950ea8b 100644
--- a/actix-http/src/header/common/mod.rs
+++ b/actix-http/src/header/common/mod.rs
@@ -159,7 +159,7 @@ macro_rules! header {
         }
         impl std::fmt::Display for $id {
             #[inline]
-            fn fmt(&self, f: &mut std::fmt::Formatter) -> ::std::fmt::Result {
+            fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> ::std::fmt::Result {
                 $crate::http::header::fmt_comma_delimited(f, &self.0[..])
             }
         }
@@ -195,7 +195,7 @@ macro_rules! header {
         }
         impl std::fmt::Display for $id {
             #[inline]
-            fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+            fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
                 $crate::http::header::fmt_comma_delimited(f, &self.0[..])
             }
         }
@@ -231,7 +231,7 @@ macro_rules! header {
         }
         impl std::fmt::Display for $id {
             #[inline]
-            fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+            fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
                 std::fmt::Display::fmt(&self.0, f)
             }
         }
@@ -276,7 +276,7 @@ macro_rules! header {
         }
         impl std::fmt::Display for $id {
             #[inline]
-            fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+            fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
                 match *self {
                     $id::Any => f.write_str("*"),
                     $id::Items(ref fields) => $crate::http::header::fmt_comma_delimited(
diff --git a/actix-http/src/header/map.rs b/actix-http/src/header/map.rs
index dc49d53f3..132087b9e 100644
--- a/actix-http/src/header/map.rs
+++ b/actix-http/src/header/map.rs
@@ -143,7 +143,7 @@ impl HeaderMap {
     /// Returns `None` if there are no values associated with the key.
     ///
     /// [`GetAll`]: struct.GetAll.html
-    pub fn get_all<N: AsName>(&self, name: N) -> GetAll {
+    pub fn get_all<N: AsName>(&self, name: N) -> GetAll<'_> {
         GetAll {
             idx: 0,
             item: self.get2(name),
@@ -187,7 +187,7 @@ impl HeaderMap {
     /// The iteration order is arbitrary, but consistent across platforms for
     /// the same crate version. Each key will be yielded once per associated
     /// value. So, if a key has 3 associated values, it will be yielded 3 times.
-    pub fn iter(&self) -> Iter {
+    pub fn iter(&self) -> Iter<'_> {
         Iter::new(self.inner.iter())
     }
 
@@ -196,7 +196,7 @@ impl HeaderMap {
     /// The iteration order is arbitrary, but consistent across platforms for
     /// the same crate version. Each key will be yielded only once even if it
     /// has multiple associated values.
-    pub fn keys(&self) -> Keys {
+    pub fn keys(&self) -> Keys<'_> {
         Keys(self.inner.keys())
     }
 
diff --git a/actix-http/src/header/mod.rs b/actix-http/src/header/mod.rs
index 6fd3c1b96..0db26ceb0 100644
--- a/actix-http/src/header/mod.rs
+++ b/actix-http/src/header/mod.rs
@@ -217,7 +217,7 @@ impl fmt::Write for Writer {
     }
 
     #[inline]
-    fn write_fmt(&mut self, args: fmt::Arguments) -> fmt::Result {
+    fn write_fmt(&mut self, args: fmt::Arguments<'_>) -> fmt::Result {
         fmt::write(self, args)
     }
 }
@@ -259,7 +259,7 @@ pub fn from_one_raw_str<T: FromStr>(val: Option<&HeaderValue>) -> Result<T, Pars
 #[inline]
 #[doc(hidden)]
 /// Format an array into a comma-delimited string.
-pub fn fmt_comma_delimited<T>(f: &mut fmt::Formatter, parts: &[T]) -> fmt::Result
+pub fn fmt_comma_delimited<T>(f: &mut fmt::Formatter<'_>, parts: &[T]) -> fmt::Result
 where
     T: fmt::Display,
 {
@@ -361,7 +361,7 @@ pub fn parse_extended_value(
 }
 
 impl fmt::Display for ExtendedValue {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         let encoded_value =
             percent_encoding::percent_encode(&self.value[..], HTTP_VALUE);
         if let Some(ref lang) = self.language_tag {
@@ -376,7 +376,7 @@ impl fmt::Display for ExtendedValue {
 /// [https://tools.ietf.org/html/rfc5987#section-3.2][url]
 ///
 /// [url]: https://tools.ietf.org/html/rfc5987#section-3.2
-pub fn http_percent_encode(f: &mut fmt::Formatter, bytes: &[u8]) -> fmt::Result {
+pub fn http_percent_encode(f: &mut fmt::Formatter<'_>, bytes: &[u8]) -> fmt::Result {
     let encoded = percent_encoding::percent_encode(bytes, HTTP_VALUE);
     fmt::Display::fmt(&encoded, f)
 }
diff --git a/actix-http/src/header/shared/charset.rs b/actix-http/src/header/shared/charset.rs
index ec3fe3854..6ddfa03ea 100644
--- a/actix-http/src/header/shared/charset.rs
+++ b/actix-http/src/header/shared/charset.rs
@@ -98,7 +98,7 @@ impl Charset {
 }
 
 impl Display for Charset {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         f.write_str(self.label())
     }
 }
diff --git a/actix-http/src/header/shared/encoding.rs b/actix-http/src/header/shared/encoding.rs
index af7404828..aa49dea45 100644
--- a/actix-http/src/header/shared/encoding.rs
+++ b/actix-http/src/header/shared/encoding.rs
@@ -27,7 +27,7 @@ pub enum Encoding {
 }
 
 impl fmt::Display for Encoding {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         f.write_str(match *self {
             Chunked => "chunked",
             Brotli => "br",
diff --git a/actix-http/src/header/shared/entity.rs b/actix-http/src/header/shared/entity.rs
index 7ef51a7d6..3525a19c6 100644
--- a/actix-http/src/header/shared/entity.rs
+++ b/actix-http/src/header/shared/entity.rs
@@ -113,7 +113,7 @@ impl EntityTag {
 }
 
 impl Display for EntityTag {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         if self.weak {
             write!(f, "W/\"{}\"", self.tag)
         } else {
diff --git a/actix-http/src/header/shared/httpdate.rs b/actix-http/src/header/shared/httpdate.rs
index c8d26ef54..28d6a25ec 100644
--- a/actix-http/src/header/shared/httpdate.rs
+++ b/actix-http/src/header/shared/httpdate.rs
@@ -28,7 +28,7 @@ impl FromStr for HttpDate {
 }
 
 impl Display for HttpDate {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         fmt::Display::fmt(&self.0.to_utc().rfc822(), f)
     }
 }
diff --git a/actix-http/src/header/shared/quality_item.rs b/actix-http/src/header/shared/quality_item.rs
index fc3930c5e..98230dec1 100644
--- a/actix-http/src/header/shared/quality_item.rs
+++ b/actix-http/src/header/shared/quality_item.rs
@@ -53,7 +53,7 @@ impl<T: PartialEq> cmp::PartialOrd for QualityItem<T> {
 }
 
 impl<T: fmt::Display> fmt::Display for QualityItem<T> {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         fmt::Display::fmt(&self.item, f)?;
         match self.quality.0 {
             1000 => Ok(()),
diff --git a/actix-http/src/httpmessage.rs b/actix-http/src/httpmessage.rs
index 05d668c10..e1c4136b0 100644
--- a/actix-http/src/httpmessage.rs
+++ b/actix-http/src/httpmessage.rs
@@ -25,10 +25,10 @@ pub trait HttpMessage: Sized {
     fn take_payload(&mut self) -> Payload<Self::Stream>;
 
     /// Request's extensions container
-    fn extensions(&self) -> Ref<Extensions>;
+    fn extensions(&self) -> Ref<'_, Extensions>;
 
     /// Mutable reference to a the request's extensions container
-    fn extensions_mut(&self) -> RefMut<Extensions>;
+    fn extensions_mut(&self) -> RefMut<'_, Extensions>;
 
     #[doc(hidden)]
     /// Get a header
@@ -105,7 +105,7 @@ pub trait HttpMessage: Sized {
 
     /// Load request cookies.
     #[inline]
-    fn cookies(&self) -> Result<Ref<Vec<Cookie<'static>>>, CookieParseError> {
+    fn cookies(&self) -> Result<Ref<'_, Vec<Cookie<'static>>>, CookieParseError> {
         if self.extensions().get::<Cookies>().is_none() {
             let mut cookies = Vec::new();
             for hdr in self.headers().get_all(header::COOKIE) {
@@ -153,12 +153,12 @@ where
     }
 
     /// Request's extensions container
-    fn extensions(&self) -> Ref<Extensions> {
+    fn extensions(&self) -> Ref<'_, Extensions> {
         (**self).extensions()
     }
 
     /// Mutable reference to a the request's extensions container
-    fn extensions_mut(&self) -> RefMut<Extensions> {
+    fn extensions_mut(&self) -> RefMut<'_, Extensions> {
         (**self).extensions_mut()
     }
 }
diff --git a/actix-http/src/lib.rs b/actix-http/src/lib.rs
index 190d5fbdc..1da074ad1 100644
--- a/actix-http/src/lib.rs
+++ b/actix-http/src/lib.rs
@@ -1,4 +1,5 @@
 //! Basic http primitives for actix-net framework.
+#![deny(rust_2018_idioms, warnings)]
 #![allow(
     clippy::type_complexity,
     clippy::too_many_arguments,
diff --git a/actix-http/src/message.rs b/actix-http/src/message.rs
index 5994ed39e..d005ad04a 100644
--- a/actix-http/src/message.rs
+++ b/actix-http/src/message.rs
@@ -78,13 +78,13 @@ impl Head for RequestHead {
 impl RequestHead {
     /// Message extensions
     #[inline]
-    pub fn extensions(&self) -> Ref<Extensions> {
+    pub fn extensions(&self) -> Ref<'_, Extensions> {
         self.extensions.borrow()
     }
 
     /// Mutable reference to a the message's extensions
     #[inline]
-    pub fn extensions_mut(&self) -> RefMut<Extensions> {
+    pub fn extensions_mut(&self) -> RefMut<'_, Extensions> {
         self.extensions.borrow_mut()
     }
 
@@ -237,13 +237,13 @@ impl ResponseHead {
 
     /// Message extensions
     #[inline]
-    pub fn extensions(&self) -> Ref<Extensions> {
+    pub fn extensions(&self) -> Ref<'_, Extensions> {
         self.extensions.borrow()
     }
 
     /// Mutable reference to a the message's extensions
     #[inline]
-    pub fn extensions_mut(&self) -> RefMut<Extensions> {
+    pub fn extensions_mut(&self) -> RefMut<'_, Extensions> {
         self.extensions.borrow_mut()
     }
 
diff --git a/actix-http/src/payload.rs b/actix-http/src/payload.rs
index b3ec04d11..9f7f2a31f 100644
--- a/actix-http/src/payload.rs
+++ b/actix-http/src/payload.rs
@@ -56,7 +56,10 @@ where
     type Item = Result<Bytes, PayloadError>;
 
     #[inline]
-    fn poll_next(self: Pin<&mut Self>, cx: &mut Context) -> Poll<Option<Self::Item>> {
+    fn poll_next(
+        self: Pin<&mut Self>,
+        cx: &mut Context<'_>,
+    ) -> Poll<Option<Self::Item>> {
         match self.get_mut() {
             Payload::None => Poll::Ready(None),
             Payload::H1(ref mut pl) => pl.readany(cx),
diff --git a/actix-http/src/request.rs b/actix-http/src/request.rs
index 371e2ccd8..64e302441 100644
--- a/actix-http/src/request.rs
+++ b/actix-http/src/request.rs
@@ -25,13 +25,13 @@ impl<P> HttpMessage for Request<P> {
 
     /// Request extensions
     #[inline]
-    fn extensions(&self) -> Ref<Extensions> {
+    fn extensions(&self) -> Ref<'_, Extensions> {
         self.head.extensions()
     }
 
     /// Mutable reference to a the request's extensions
     #[inline]
-    fn extensions_mut(&self) -> RefMut<Extensions> {
+    fn extensions_mut(&self) -> RefMut<'_, Extensions> {
         self.head.extensions_mut()
     }
 
@@ -165,7 +165,7 @@ impl<P> Request<P> {
 }
 
 impl<P> fmt::Debug for Request<P> {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         writeln!(
             f,
             "\nRequest {:?} {}:{}",
diff --git a/actix-http/src/response.rs b/actix-http/src/response.rs
index e7f145d39..eee0abc73 100644
--- a/actix-http/src/response.rs
+++ b/actix-http/src/response.rs
@@ -130,7 +130,7 @@ impl<B> Response<B> {
 
     /// Get an iterator for the cookies set by this response
     #[inline]
-    pub fn cookies(&self) -> CookieIter {
+    pub fn cookies(&self) -> CookieIter<'_> {
         CookieIter {
             iter: self.head.headers.get_all(header::SET_COOKIE),
         }
@@ -138,7 +138,7 @@ impl<B> Response<B> {
 
     /// Add a cookie to this response
     #[inline]
-    pub fn add_cookie(&mut self, cookie: &Cookie) -> Result<(), HttpError> {
+    pub fn add_cookie(&mut self, cookie: &Cookie<'_>) -> Result<(), HttpError> {
         let h = &mut self.head.headers;
         HeaderValue::from_str(&cookie.to_string())
             .map(|c| {
@@ -186,13 +186,13 @@ impl<B> Response<B> {
 
     /// Responses extensions
     #[inline]
-    pub fn extensions(&self) -> Ref<Extensions> {
+    pub fn extensions(&self) -> Ref<'_, Extensions> {
         self.head.extensions.borrow()
     }
 
     /// Mutable reference to a the response's extensions
     #[inline]
-    pub fn extensions_mut(&mut self) -> RefMut<Extensions> {
+    pub fn extensions_mut(&mut self) -> RefMut<'_, Extensions> {
         self.head.extensions.borrow_mut()
     }
 
@@ -265,7 +265,7 @@ impl<B> Response<B> {
 }
 
 impl<B: MessageBody> fmt::Debug for Response<B> {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         let res = writeln!(
             f,
             "\nResponse {:?} {}{}",
@@ -285,7 +285,7 @@ impl<B: MessageBody> fmt::Debug for Response<B> {
 impl Future for Response {
     type Output = Result<Response, Error>;
 
-    fn poll(mut self: Pin<&mut Self>, _: &mut Context) -> Poll<Self::Output> {
+    fn poll(mut self: Pin<&mut Self>, _: &mut Context<'_>) -> Poll<Self::Output> {
         Poll::Ready(Ok(Response {
             head: self.head.take(),
             body: self.body.take_body(),
@@ -588,14 +588,14 @@ impl ResponseBuilder {
 
     /// Responses extensions
     #[inline]
-    pub fn extensions(&self) -> Ref<Extensions> {
+    pub fn extensions(&self) -> Ref<'_, Extensions> {
         let head = self.head.as_ref().expect("cannot reuse response builder");
         head.extensions.borrow()
     }
 
     /// Mutable reference to a the response's extensions
     #[inline]
-    pub fn extensions_mut(&mut self) -> RefMut<Extensions> {
+    pub fn extensions_mut(&mut self) -> RefMut<'_, Extensions> {
         let head = self.head.as_ref().expect("cannot reuse response builder");
         head.extensions.borrow_mut()
     }
@@ -765,13 +765,13 @@ impl<'a> From<&'a ResponseHead> for ResponseBuilder {
 impl Future for ResponseBuilder {
     type Output = Result<Response, Error>;
 
-    fn poll(mut self: Pin<&mut Self>, _: &mut Context) -> Poll<Self::Output> {
+    fn poll(mut self: Pin<&mut Self>, _: &mut Context<'_>) -> Poll<Self::Output> {
         Poll::Ready(Ok(self.finish()))
     }
 }
 
 impl fmt::Debug for ResponseBuilder {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         let head = self.head.as_ref().unwrap();
 
         let res = writeln!(
diff --git a/actix-http/src/service.rs b/actix-http/src/service.rs
index 3624060bf..cb7e541ee 100644
--- a/actix-http/src/service.rs
+++ b/actix-http/src/service.rs
@@ -403,7 +403,7 @@ where
     type Output =
         Result<HttpServiceHandler<T, S::Service, B, X::Service, U::Service>, ()>;
 
-    fn poll(mut self: Pin<&mut Self>, cx: &mut Context) -> Poll<Self::Output> {
+    fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
         let mut this = self.as_mut().project();
 
         if let Some(fut) = this.fut_ex.as_pin_mut() {
@@ -499,7 +499,7 @@ where
     type Error = DispatchError;
     type Future = HttpServiceHandlerResponse<T, S, B, X, U>;
 
-    fn poll_ready(&mut self, cx: &mut Context) -> Poll<Result<(), Self::Error>> {
+    fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
         let ready = self
             .expect
             .poll_ready(cx)
@@ -619,7 +619,7 @@ where
 {
     type Output = Result<(), DispatchError>;
 
-    fn poll(self: Pin<&mut Self>, cx: &mut Context) -> Poll<Self::Output> {
+    fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
         self.project().state.poll(cx)
     }
 }
@@ -639,7 +639,7 @@ where
     #[project]
     fn poll(
         mut self: Pin<&mut Self>,
-        cx: &mut Context,
+        cx: &mut Context<'_>,
     ) -> Poll<Result<(), DispatchError>> {
         #[project]
         match self.as_mut().project() {
diff --git a/actix-http/src/ws/mask.rs b/actix-http/src/ws/mask.rs
index 9f7304039..7eb5d148f 100644
--- a/actix-http/src/ws/mask.rs
+++ b/actix-http/src/ws/mask.rs
@@ -51,7 +51,7 @@ pub(crate) fn apply_mask(buf: &mut [u8], mask_u32: u32) {
 // inefficient, it could be done better. The compiler does not understand that
 // a `ShortSlice` must be smaller than a u64.
 #[allow(clippy::needless_pass_by_value)]
-fn xor_short(buf: ShortSlice, mask: u64) {
+fn xor_short(buf: ShortSlice<'_>, mask: u64) {
     // Unsafe: we know that a `ShortSlice` fits in a u64
     unsafe {
         let (ptr, len) = (buf.0.as_mut_ptr(), buf.0.len());
@@ -77,7 +77,7 @@ unsafe fn cast_slice(buf: &mut [u8]) -> &mut [u64] {
 #[inline]
 // Splits a slice into three parts: an unaligned short head and tail, plus an aligned
 // u64 mid section.
-fn align_buf(buf: &mut [u8]) -> (ShortSlice, &mut [u64], ShortSlice) {
+fn align_buf(buf: &mut [u8]) -> (ShortSlice<'_>, &mut [u64], ShortSlice<'_>) {
     let start_ptr = buf.as_ptr() as usize;
     let end_ptr = start_ptr + buf.len();
 
diff --git a/actix-http/src/ws/proto.rs b/actix-http/src/ws/proto.rs
index e14651a56..df928cdbb 100644
--- a/actix-http/src/ws/proto.rs
+++ b/actix-http/src/ws/proto.rs
@@ -24,7 +24,7 @@ pub enum OpCode {
 }
 
 impl fmt::Display for OpCode {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         match *self {
             Continue => write!(f, "CONTINUE"),
             Text => write!(f, "TEXT"),
diff --git a/actix-http/src/ws/transport.rs b/actix-http/src/ws/transport.rs
index 58ba3160f..101e8f65d 100644
--- a/actix-http/src/ws/transport.rs
+++ b/actix-http/src/ws/transport.rs
@@ -45,7 +45,7 @@ where
 {
     type Output = Result<(), FramedTransportError<S::Error, Codec>>;
 
-    fn poll(mut self: Pin<&mut Self>, cx: &mut Context) -> Poll<Self::Output> {
+    fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
         Pin::new(&mut self.inner).poll(cx)
     }
 }
diff --git a/src/app_service.rs b/src/app_service.rs
index 6a91fa079..b6e4388a1 100644
--- a/src/app_service.rs
+++ b/src/app_service.rs
@@ -154,7 +154,7 @@ where
 {
     type Output = Result<AppInitService<T::Service, B>, ()>;
 
-    fn poll(self: Pin<&mut Self>, cx: &mut Context) -> Poll<Self::Output> {
+    fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
         let this = self.project();
 
         // async data factories
@@ -220,7 +220,7 @@ where
     type Error = T::Error;
     type Future = T::Future;
 
-    fn poll_ready(&mut self, cx: &mut Context) -> Poll<Result<(), Self::Error>> {
+    fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
         self.service.poll_ready(cx)
     }
 
@@ -310,7 +310,7 @@ enum CreateAppRoutingItem {
 impl Future for AppRoutingFactoryResponse {
     type Output = Result<AppRouting, ()>;
 
-    fn poll(mut self: Pin<&mut Self>, cx: &mut Context) -> Poll<Self::Output> {
+    fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
         let mut done = true;
 
         if let Some(ref mut fut) = self.default_fut {
@@ -381,7 +381,7 @@ impl Service for AppRouting {
     type Error = Error;
     type Future = BoxResponse;
 
-    fn poll_ready(&mut self, _: &mut Context) -> Poll<Result<(), Self::Error>> {
+    fn poll_ready(&mut self, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
         if self.ready.is_none() {
             Poll::Ready(Ok(()))
         } else {
diff --git a/src/extract.rs b/src/extract.rs
index d43402c73..bc3027c1a 100644
--- a/src/extract.rs
+++ b/src/extract.rs
@@ -220,7 +220,7 @@ macro_rules! tuple_from_req ({$fut_type:ident, $(($n:tt, $T:ident)),+} => {
     {
         type Output = Result<($($T,)+), Error>;
 
-        fn poll(self: Pin<&mut Self>, cx: &mut Context) -> Poll<Self::Output> {
+        fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
             let this = self.project();
 
             let mut ready = true;
diff --git a/src/handler.rs b/src/handler.rs
index d1b070d88..33cd2408d 100644
--- a/src/handler.rs
+++ b/src/handler.rs
@@ -85,7 +85,7 @@ where
     type Error = Infallible;
     type Future = HandlerServiceResponse<R, O>;
 
-    fn poll_ready(&mut self, _: &mut Context) -> Poll<Result<(), Self::Error>> {
+    fn poll_ready(&mut self, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
         Poll::Ready(Ok(()))
     }
 
@@ -119,7 +119,7 @@ where
 {
     type Output = Result<ServiceResponse, Infallible>;
 
-    fn poll(mut self: Pin<&mut Self>, cx: &mut Context) -> Poll<Self::Output> {
+    fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
         let this = self.as_mut().project();
 
         if let Some(fut) = this.fut2.as_pin_mut() {
@@ -203,7 +203,7 @@ where
     type Error = (Error, ServiceRequest);
     type Future = ExtractResponse<T, S>;
 
-    fn poll_ready(&mut self, _: &mut Context) -> Poll<Result<(), Self::Error>> {
+    fn poll_ready(&mut self, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
         Poll::Ready(Ok(()))
     }
 
@@ -240,7 +240,7 @@ where
 {
     type Output = Result<ServiceResponse, (Error, ServiceRequest)>;
 
-    fn poll(mut self: Pin<&mut Self>, cx: &mut Context) -> Poll<Self::Output> {
+    fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
         let this = self.as_mut().project();
 
         if let Some(fut) = this.fut_s.as_pin_mut() {
diff --git a/src/lib.rs b/src/lib.rs
index 04149fbfd..1c5698f1d 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,4 +1,5 @@
-#![allow(clippy::borrow_interior_mutable_const)]
+#![deny(rust_2018_idioms, warnings)]
+#![allow(clippy::type_complexity, clippy::borrow_interior_mutable_const)]
 //! Actix web is a small, pragmatic, and extremely fast web framework
 //! for Rust.
 //!
diff --git a/src/middleware/compress.rs b/src/middleware/compress.rs
index a697deaec..9551ac1e0 100644
--- a/src/middleware/compress.rs
+++ b/src/middleware/compress.rs
@@ -106,7 +106,7 @@ where
     type Error = Error;
     type Future = CompressResponse<S, B>;
 
-    fn poll_ready(&mut self, cx: &mut Context) -> Poll<Result<(), Self::Error>> {
+    fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
         self.service.poll_ready(cx)
     }
 
@@ -150,7 +150,7 @@ where
 {
     type Output = Result<ServiceResponse<Encoder<B>>, Error>;
 
-    fn poll(self: Pin<&mut Self>, cx: &mut Context) -> Poll<Self::Output> {
+    fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
         let this = self.project();
 
         match futures::ready!(this.fut.poll(cx)) {
diff --git a/src/middleware/condition.rs b/src/middleware/condition.rs
index 2ede81783..68d06837e 100644
--- a/src/middleware/condition.rs
+++ b/src/middleware/condition.rs
@@ -76,7 +76,7 @@ where
     type Error = E::Error;
     type Future = Either<E::Future, D::Future>;
 
-    fn poll_ready(&mut self, cx: &mut Context) -> Poll<Result<(), Self::Error>> {
+    fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
         use ConditionMiddleware::*;
         match self {
             Enable(service) => service.poll_ready(cx),
diff --git a/src/middleware/defaultheaders.rs b/src/middleware/defaultheaders.rs
index 14d035ab8..464be1ace 100644
--- a/src/middleware/defaultheaders.rs
+++ b/src/middleware/defaultheaders.rs
@@ -124,7 +124,7 @@ where
     type Error = Error;
     type Future = LocalBoxFuture<'static, Result<Self::Response, Self::Error>>;
 
-    fn poll_ready(&mut self, cx: &mut Context) -> Poll<Result<(), Self::Error>> {
+    fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
         self.service.poll_ready(cx)
     }
 
diff --git a/src/middleware/errhandlers.rs b/src/middleware/errhandlers.rs
index 7a8684936..ed1e4c999 100644
--- a/src/middleware/errhandlers.rs
+++ b/src/middleware/errhandlers.rs
@@ -119,7 +119,7 @@ where
     type Error = Error;
     type Future = LocalBoxFuture<'static, Result<Self::Response, Self::Error>>;
 
-    fn poll_ready(&mut self, cx: &mut Context) -> Poll<Result<(), Self::Error>> {
+    fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
         self.service.poll_ready(cx)
     }
 
diff --git a/src/middleware/logger.rs b/src/middleware/logger.rs
index 60c10b207..97fa7463f 100644
--- a/src/middleware/logger.rs
+++ b/src/middleware/logger.rs
@@ -154,7 +154,7 @@ where
     type Error = Error;
     type Future = LoggerResponse<S, B>;
 
-    fn poll_ready(&mut self, cx: &mut Context) -> Poll<Result<(), Self::Error>> {
+    fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
         self.service.poll_ready(cx)
     }
 
@@ -204,7 +204,7 @@ where
 {
     type Output = Result<ServiceResponse<StreamLog<B>>, Error>;
 
-    fn poll(self: Pin<&mut Self>, cx: &mut Context) -> Poll<Self::Output> {
+    fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
         let this = self.project();
 
         let res = match futures::ready!(this.fut.poll(cx)) {
@@ -248,7 +248,7 @@ pub struct StreamLog<B> {
 impl<B> Drop for StreamLog<B> {
     fn drop(&mut self) {
         if let Some(ref format) = self.format {
-            let render = |fmt: &mut Formatter| {
+            let render = |fmt: &mut Formatter<'_>| {
                 for unit in &format.0 {
                     unit.render(fmt, self.size, self.time)?;
                 }
@@ -264,7 +264,7 @@ impl<B: MessageBody> MessageBody for StreamLog<B> {
         self.body.size()
     }
 
-    fn poll_next(&mut self, cx: &mut Context) -> Poll<Option<Result<Bytes, Error>>> {
+    fn poll_next(&mut self, cx: &mut Context<'_>) -> Poll<Option<Result<Bytes, Error>>> {
         match self.body.poll_next(cx) {
             Poll::Ready(Some(Ok(chunk))) => {
                 self.size += chunk.len();
@@ -364,7 +364,7 @@ pub enum FormatText {
 impl FormatText {
     fn render(
         &self,
-        fmt: &mut Formatter,
+        fmt: &mut Formatter<'_>,
         size: usize,
         entry_time: time::Tm,
     ) -> Result<(), fmt::Error> {
@@ -464,11 +464,11 @@ impl FormatText {
 }
 
 pub(crate) struct FormatDisplay<'a>(
-    &'a dyn Fn(&mut Formatter) -> Result<(), fmt::Error>,
+    &'a dyn Fn(&mut Formatter<'_>) -> Result<(), fmt::Error>,
 );
 
 impl<'a> fmt::Display for FormatDisplay<'a> {
-    fn fmt(&self, fmt: &mut Formatter) -> Result<(), fmt::Error> {
+    fn fmt(&self, fmt: &mut Formatter<'_>) -> Result<(), fmt::Error> {
         (self.0)(fmt)
     }
 }
@@ -523,7 +523,7 @@ mod tests {
             unit.render_response(&resp);
         }
 
-        let render = |fmt: &mut Formatter| {
+        let render = |fmt: &mut Formatter<'_>| {
             for unit in &format.0 {
                 unit.render(fmt, 1024, now)?;
             }
@@ -555,7 +555,7 @@ mod tests {
         }
 
         let entry_time = time::now();
-        let render = |fmt: &mut Formatter| {
+        let render = |fmt: &mut Formatter<'_>| {
             for unit in &format.0 {
                 unit.render(fmt, 1024, entry_time)?;
             }
@@ -582,7 +582,7 @@ mod tests {
             unit.render_response(&resp);
         }
 
-        let render = |fmt: &mut Formatter| {
+        let render = |fmt: &mut Formatter<'_>| {
             for unit in &format.0 {
                 unit.render(fmt, 1024, now)?;
             }
diff --git a/src/middleware/normalize.rs b/src/middleware/normalize.rs
index 6bff068bc..f6b834bfe 100644
--- a/src/middleware/normalize.rs
+++ b/src/middleware/normalize.rs
@@ -68,7 +68,7 @@ where
     type Error = Error;
     type Future = S::Future;
 
-    fn poll_ready(&mut self, cx: &mut Context) -> Poll<Result<(), Self::Error>> {
+    fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
         self.service.poll_ready(cx)
     }
 
@@ -88,7 +88,6 @@ where
                 Bytes::copy_from_slice(path.as_bytes())
             };
             parts.path_and_query = Some(PathAndQuery::from_maybe_shared(path).unwrap());
-            drop(head);
 
             let uri = Uri::from_parts(parts).unwrap();
             req.match_info_mut().get_mut().update(&uri);
diff --git a/src/request.rs b/src/request.rs
index 84f0503c0..46b8fe387 100644
--- a/src/request.rs
+++ b/src/request.rs
@@ -125,13 +125,13 @@ impl HttpRequest {
 
     /// Request extensions
     #[inline]
-    pub fn extensions(&self) -> Ref<Extensions> {
+    pub fn extensions(&self) -> Ref<'_, Extensions> {
         self.head().extensions()
     }
 
     /// Mutable reference to a the request's extensions
     #[inline]
-    pub fn extensions_mut(&self) -> RefMut<Extensions> {
+    pub fn extensions_mut(&self) -> RefMut<'_, Extensions> {
         self.head().extensions_mut()
     }
 
@@ -197,7 +197,7 @@ impl HttpRequest {
     /// This method panics if request's extensions container is already
     /// borrowed.
     #[inline]
-    pub fn connection_info(&self) -> Ref<ConnectionInfo> {
+    pub fn connection_info(&self) -> Ref<'_, ConnectionInfo> {
         ConnectionInfo::get(self.head(), &*self.app_config())
     }
 
@@ -239,13 +239,13 @@ impl HttpMessage for HttpRequest {
 
     /// Request extensions
     #[inline]
-    fn extensions(&self) -> Ref<Extensions> {
+    fn extensions(&self) -> Ref<'_, Extensions> {
         self.0.head.extensions()
     }
 
     /// Mutable reference to a the request's extensions
     #[inline]
-    fn extensions_mut(&self) -> RefMut<Extensions> {
+    fn extensions_mut(&self) -> RefMut<'_, Extensions> {
         self.0.head.extensions_mut()
     }
 
@@ -299,7 +299,7 @@ impl FromRequest for HttpRequest {
 }
 
 impl fmt::Debug for HttpRequest {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         writeln!(
             f,
             "\nHttpRequest {:?} {}:{}",
diff --git a/src/resource.rs b/src/resource.rs
index 7ee0506a3..41d663d3d 100644
--- a/src/resource.rs
+++ b/src/resource.rs
@@ -470,7 +470,7 @@ pub struct CreateResourceService {
 impl Future for CreateResourceService {
     type Output = Result<ResourceService, ()>;
 
-    fn poll(mut self: Pin<&mut Self>, cx: &mut Context) -> Poll<Self::Output> {
+    fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
         let mut done = true;
 
         if let Some(ref mut fut) = self.default_fut {
@@ -530,7 +530,7 @@ impl Service for ResourceService {
         LocalBoxFuture<'static, Result<ServiceResponse, Error>>,
     >;
 
-    fn poll_ready(&mut self, _: &mut Context) -> Poll<Result<(), Self::Error>> {
+    fn poll_ready(&mut self, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
         Poll::Ready(Ok(()))
     }
 
diff --git a/src/responder.rs b/src/responder.rs
index 48eae09b6..7189eecf1 100644
--- a/src/responder.rs
+++ b/src/responder.rs
@@ -313,7 +313,7 @@ pub struct CustomResponderFut<T: Responder> {
 impl<T: Responder> Future for CustomResponderFut<T> {
     type Output = Result<Response, T::Error>;
 
-    fn poll(self: Pin<&mut Self>, cx: &mut Context) -> Poll<Self::Output> {
+    fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
         let this = self.project();
 
         let mut res = match ready!(this.fut.poll(cx)) {
@@ -397,7 +397,7 @@ where
     type Output = Result<Response, Error>;
 
     #[project]
-    fn poll(self: Pin<&mut Self>, cx: &mut Context) -> Poll<Self::Output> {
+    fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
         #[project]
         match self.project() {
             EitherResponder::A(fut) => {
@@ -446,7 +446,7 @@ where
 {
     type Output = Result<Response, Error>;
 
-    fn poll(self: Pin<&mut Self>, cx: &mut Context) -> Poll<Self::Output> {
+    fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
         Poll::Ready(ready!(self.project().fut.poll(cx)).map_err(|e| e.into()))
     }
 }
diff --git a/src/route.rs b/src/route.rs
index 2c643099b..f7e391746 100644
--- a/src/route.rs
+++ b/src/route.rs
@@ -92,7 +92,7 @@ pub struct CreateRouteService {
 impl Future for CreateRouteService {
     type Output = Result<RouteService, ()>;
 
-    fn poll(self: Pin<&mut Self>, cx: &mut Context) -> Poll<Self::Output> {
+    fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
         let this = self.project();
 
         match this.fut.poll(cx)? {
@@ -127,7 +127,7 @@ impl Service for RouteService {
     type Error = Error;
     type Future = LocalBoxFuture<'static, Result<Self::Response, Self::Error>>;
 
-    fn poll_ready(&mut self, cx: &mut Context) -> Poll<Result<(), Self::Error>> {
+    fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
         self.service.poll_ready(cx)
     }
 
@@ -313,7 +313,7 @@ where
     type Error = Error;
     type Future = LocalBoxFuture<'static, Result<Self::Response, Self::Error>>;
 
-    fn poll_ready(&mut self, cx: &mut Context) -> Poll<Result<(), Self::Error>> {
+    fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
         self.service.poll_ready(cx).map_err(|(e, _)| e)
     }
 
diff --git a/src/scope.rs b/src/scope.rs
index d6b88577b..26ace6892 100644
--- a/src/scope.rs
+++ b/src/scope.rs
@@ -534,7 +534,7 @@ enum CreateScopeServiceItem {
 impl Future for ScopeFactoryResponse {
     type Output = Result<ScopeService, ()>;
 
-    fn poll(mut self: Pin<&mut Self>, cx: &mut Context) -> Poll<Self::Output> {
+    fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
         let mut done = true;
 
         if let Some(ref mut fut) = self.default_fut {
@@ -606,7 +606,7 @@ impl Service for ScopeService {
     type Error = Error;
     type Future = Either<BoxedResponse, Ready<Result<Self::Response, Self::Error>>>;
 
-    fn poll_ready(&mut self, _: &mut Context) -> Poll<Result<(), Self::Error>> {
+    fn poll_ready(&mut self, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
         Poll::Ready(Ok(()))
     }
 
diff --git a/src/server.rs b/src/server.rs
index 03abad160..a4569ce3d 100644
--- a/src/server.rs
+++ b/src/server.rs
@@ -5,7 +5,6 @@ use std::{fmt, io, net};
 use actix_http::{
     body::MessageBody, Error, HttpService, KeepAlive, Protocol, Request, Response,
 };
-use actix_rt::System;
 use actix_server::{Server, ServerBuilder};
 use actix_service::{pipeline_factory, IntoServiceFactory, Service, ServiceFactory};
 use futures::future::ok;
diff --git a/src/service.rs b/src/service.rs
index b392e6e8b..b58fb5b4e 100644
--- a/src/service.rs
+++ b/src/service.rs
@@ -181,7 +181,7 @@ impl ServiceRequest {
 
     /// Get *ConnectionInfo* for the current request.
     #[inline]
-    pub fn connection_info(&self) -> Ref<ConnectionInfo> {
+    pub fn connection_info(&self) -> Ref<'_, ConnectionInfo> {
         ConnectionInfo::get(self.head(), &*self.app_config())
     }
 
@@ -253,13 +253,13 @@ impl HttpMessage for ServiceRequest {
 
     /// Request extensions
     #[inline]
-    fn extensions(&self) -> Ref<Extensions> {
+    fn extensions(&self) -> Ref<'_, Extensions> {
         self.0.extensions()
     }
 
     /// Mutable reference to a the request's extensions
     #[inline]
-    fn extensions_mut(&self) -> RefMut<Extensions> {
+    fn extensions_mut(&self) -> RefMut<'_, Extensions> {
         self.0.extensions_mut()
     }
 
@@ -270,7 +270,7 @@ impl HttpMessage for ServiceRequest {
 }
 
 impl fmt::Debug for ServiceRequest {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         writeln!(
             f,
             "\nServiceRequest {:?} {}:{}",
@@ -404,7 +404,7 @@ impl<B> Into<Response<B>> for ServiceResponse<B> {
 }
 
 impl<B: MessageBody> fmt::Debug for ServiceResponse<B> {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         let res = writeln!(
             f,
             "\nServiceResponse {:?} {}{}",
diff --git a/src/test.rs b/src/test.rs
index 5e50f24e1..419ea2d36 100644
--- a/src/test.rs
+++ b/src/test.rs
@@ -388,7 +388,7 @@ impl TestRequest {
     }
 
     /// Set cookie for this request
-    pub fn cookie(mut self, cookie: Cookie) -> Self {
+    pub fn cookie(mut self, cookie: Cookie<'_>) -> Self {
         self.req.cookie(cookie);
         self
     }
diff --git a/src/types/form.rs b/src/types/form.rs
index e1bd52375..977f88d0b 100644
--- a/src/types/form.rs
+++ b/src/types/form.rs
@@ -141,13 +141,13 @@ where
 }
 
 impl<T: fmt::Debug> fmt::Debug for Form<T> {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         self.0.fmt(f)
     }
 }
 
 impl<T: fmt::Display> fmt::Display for Form<T> {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         self.0.fmt(f)
     }
 }
@@ -308,7 +308,7 @@ where
 {
     type Output = Result<U, UrlencodedError>;
 
-    fn poll(mut self: Pin<&mut Self>, cx: &mut Context) -> Poll<Self::Output> {
+    fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
         if let Some(ref mut fut) = self.fut {
             return Pin::new(fut).poll(cx);
         }
diff --git a/src/types/json.rs b/src/types/json.rs
index 028092d1a..8112d04f2 100644
--- a/src/types/json.rs
+++ b/src/types/json.rs
@@ -106,7 +106,7 @@ impl<T> fmt::Debug for Json<T>
 where
     T: fmt::Debug,
 {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         write!(f, "Json: {:?}", self.0)
     }
 }
@@ -115,7 +115,7 @@ impl<T> fmt::Display for Json<T>
 where
     T: fmt::Display,
 {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         fmt::Display::fmt(&self.0, f)
     }
 }
@@ -356,7 +356,7 @@ where
 {
     type Output = Result<U, JsonPayloadError>;
 
-    fn poll(mut self: Pin<&mut Self>, cx: &mut Context) -> Poll<Self::Output> {
+    fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
         if let Some(ref mut fut) = self.fut {
             return Pin::new(fut).poll(cx);
         }
diff --git a/src/types/path.rs b/src/types/path.rs
index 404759300..d1a5f1fb9 100644
--- a/src/types/path.rs
+++ b/src/types/path.rs
@@ -97,13 +97,13 @@ impl<T> From<T> for Path<T> {
 }
 
 impl<T: fmt::Debug> fmt::Debug for Path<T> {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         self.inner.fmt(f)
     }
 }
 
 impl<T: fmt::Display> fmt::Display for Path<T> {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         self.inner.fmt(f)
     }
 }
diff --git a/src/types/payload.rs b/src/types/payload.rs
index 2969e385a..8e52a3b6c 100644
--- a/src/types/payload.rs
+++ b/src/types/payload.rs
@@ -59,7 +59,7 @@ impl Stream for Payload {
     #[inline]
     fn poll_next(
         mut self: Pin<&mut Self>,
-        cx: &mut Context,
+        cx: &mut Context<'_>,
     ) -> Poll<Option<Self::Item>> {
         Pin::new(&mut self.0).poll_next(cx)
     }
@@ -351,7 +351,7 @@ impl HttpMessageBody {
 impl Future for HttpMessageBody {
     type Output = Result<Bytes, PayloadError>;
 
-    fn poll(mut self: Pin<&mut Self>, cx: &mut Context) -> Poll<Self::Output> {
+    fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
         if let Some(ref mut fut) = self.fut {
             return Pin::new(fut).poll(cx);
         }
diff --git a/src/types/query.rs b/src/types/query.rs
index b1f4572fa..9d62f31c6 100644
--- a/src/types/query.rs
+++ b/src/types/query.rs
@@ -84,13 +84,13 @@ impl<T> ops::DerefMut for Query<T> {
 }
 
 impl<T: fmt::Debug> fmt::Debug for Query<T> {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         self.0.fmt(f)
     }
 }
 
 impl<T: fmt::Display> fmt::Display for Query<T> {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         self.0.fmt(f)
     }
 }
diff --git a/src/types/readlines.rs b/src/types/readlines.rs
index 123f8102b..82853381b 100644
--- a/src/types/readlines.rs
+++ b/src/types/readlines.rs
@@ -68,7 +68,10 @@ where
 {
     type Item = Result<String, ReadlinesError>;
 
-    fn poll_next(self: Pin<&mut Self>, cx: &mut Context) -> Poll<Option<Self::Item>> {
+    fn poll_next(
+        self: Pin<&mut Self>,
+        cx: &mut Context<'_>,
+    ) -> Poll<Option<Self::Item>> {
         let this = self.get_mut();
 
         if let Some(err) = this.err.take() {