diff --git a/src/fs.rs b/src/fs.rs
index e1cc58a5..639626c5 100644
--- a/src/fs.rs
+++ b/src/fs.rs
@@ -10,7 +10,7 @@ use std::{cmp, io};
 #[cfg(unix)]
 use std::os::unix::fs::MetadataExt;
 
-use bytes::{BufMut, Bytes, BytesMut};
+use bytes::Bytes;
 use futures::{Async, Future, Poll, Stream};
 use futures_cpupool::{CpuFuture, CpuPool};
 use mime;
@@ -439,14 +439,13 @@ impl Stream for ChunkedReadFile {
             self.fut = Some(self.cpu_pool.spawn_fn(move || {
                 let max_bytes: usize;
                 max_bytes = cmp::min(size.saturating_sub(counter), 65_536) as usize;
-                let mut buf = BytesMut::from(Vec::with_capacity(max_bytes));
+                let mut buf = Vec::with_capacity(max_bytes);
                 file.seek(io::SeekFrom::Start(offset))?;
-                let nbytes = file.read(unsafe { buf.bytes_mut() })?;
+                let nbytes = file.read(buf.as_mut_slice())?;
                 if nbytes == 0 {
                     return Err(io::ErrorKind::UnexpectedEof.into());
                 }
-                unsafe { buf.advance_mut(nbytes) };
-                Ok((file, buf.freeze()))
+                Ok((file, Bytes::from(buf)))
             }));
             self.poll()
         }
diff --git a/src/httpmessage.rs b/src/httpmessage.rs
index cac82f04..5917e7fb 100644
--- a/src/httpmessage.rs
+++ b/src/httpmessage.rs
@@ -634,13 +634,11 @@ mod tests {
         assert!(req.chunked().unwrap());
 
         let mut headers = HeaderMap::new();
-        let s = unsafe {
-            str::from_utf8_unchecked(b"some va\xadscc\xacas0xsdasdlue".as_ref())
-        };
+        let hdr = Bytes::from_static(b"some va\xadscc\xacas0xsdasdlue");
 
         headers.insert(
             header::TRANSFER_ENCODING,
-            header::HeaderValue::from_str(s).unwrap(),
+            header::HeaderValue::from_shared(hdr).unwrap(),
         );
         let req = HttpRequest::new(
             Method::GET,
diff --git a/src/httprequest.rs b/src/httprequest.rs
index 9f051aa8..d511d090 100644
--- a/src/httprequest.rs
+++ b/src/httprequest.rs
@@ -1,9 +1,8 @@
 //! HTTP Request message related code.
-#![cfg_attr(feature = "cargo-clippy", allow(transmute_ptr_to_ptr))]
 use std::collections::HashMap;
 use std::net::SocketAddr;
 use std::rc::Rc;
-use std::{cmp, fmt, io, mem, str};
+use std::{cmp, fmt, io, str};
 
 use bytes::Bytes;
 use cookie::Cookie;
@@ -446,13 +445,13 @@ impl<S> HttpRequest<S> {
     /// access the matched value for that segment.
     #[inline]
     pub fn match_info(&self) -> &Params {
-        unsafe { mem::transmute(&self.as_ref().params) }
+        &self.as_ref().params
     }
 
     /// Get mutable reference to request's Params.
     #[inline]
     pub(crate) fn match_info_mut(&mut self) -> &mut Params {
-        unsafe { mem::transmute(&mut self.as_mut().params) }
+        &mut self.as_mut().params
     }
 
     /// Checks if a connection should be kept alive.
diff --git a/src/uri.rs b/src/uri.rs
index 61ee9352..aa6f767d 100644
--- a/src/uri.rs
+++ b/src/uri.rs
@@ -146,6 +146,8 @@ impl Quoter {
         }
 
         if let Some(data) = cloned {
+            // we get data from http::Uri, which does utf-8 checks already
+            // this code only decodes valid pct encoded values
             Some(unsafe { Rc::new(String::from_utf8_unchecked(data)) })
         } else {
             None