diff --git a/Cargo.toml b/Cargo.toml
index f8e43727..f032478a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -2,7 +2,6 @@
 members = [
   "actix-codec",
   "actix-connect",
-  "actix-ioframe",
   "actix-rt",
   "actix-macros",
   "actix-service",
@@ -19,7 +18,6 @@ members = [
 [patch.crates-io]
 actix-codec = { path = "actix-codec" }
 actix-connect = { path = "actix-connect" }
-actix-ioframe = { path = "actix-ioframe" }
 actix-rt = { path = "actix-rt" }
 actix-macros = { path = "actix-macros" }
 actix-server = { path = "actix-server" }
diff --git a/actix-codec/CHANGES.md b/actix-codec/CHANGES.md
index 2259e44e..fa471c01 100644
--- a/actix-codec/CHANGES.md
+++ b/actix-codec/CHANGES.md
@@ -1,6 +1,8 @@
 # Changes
 
-* Use `.advance()` intead of `.split_to()`
+## Unreleased - 2020-xx-xx
+* Use `.advance()` instead of `.split_to()`.
+* Upgrade `tokio-util` to `0.3`.
 
 ## [0.2.0] - 2019-12-10
 
@@ -8,7 +10,7 @@
 
 ## [0.2.0-alpha.4]
 
-* Fix buffer remaining capacity calcualtion
+* Fix buffer remaining capacity calculation
 
 ## [0.2.0-alpha.3]
 
diff --git a/actix-codec/Cargo.toml b/actix-codec/Cargo.toml
index 1d9a669b..8b14dd70 100644
--- a/actix-codec/Cargo.toml
+++ b/actix-codec/Cargo.toml
@@ -21,7 +21,7 @@ bitflags = "1.2.1"
 bytes = "0.5.2"
 futures-core = { version = "0.3.4", default-features = false }
 futures-sink = { version = "0.3.4", default-features = false }
-tokio = { version = "0.2.4", default-features=false }
-tokio-util = { version = "0.2.0", default-features=false, features=["codec"] }
+tokio = { version = "0.2.5", default-features = false }
+tokio-util = { version = "0.3.1", default-features = false, features = ["codec"] }
 log = "0.4"
 pin-project = "0.4.17"
diff --git a/actix-codec/src/bcodec.rs b/actix-codec/src/bcodec.rs
index c71c0fa4..4d92ee69 100644
--- a/actix-codec/src/bcodec.rs
+++ b/actix-codec/src/bcodec.rs
@@ -9,8 +9,7 @@ use super::{Decoder, Encoder};
 #[derive(Debug, Copy, Clone)]
 pub struct BytesCodec;
 
-impl Encoder for BytesCodec {
-    type Item = Bytes;
+impl Encoder<Bytes> for BytesCodec {
     type Error = io::Error;
 
     fn encode(&mut self, item: Bytes, dst: &mut BytesMut) -> Result<(), Self::Error> {
diff --git a/actix-codec/src/framed.rs b/actix-codec/src/framed.rs
index 685d87c9..cba5dd3c 100644
--- a/actix-codec/src/framed.rs
+++ b/actix-codec/src/framed.rs
@@ -9,7 +9,9 @@ use pin_project::pin_project;
 
 use crate::{AsyncRead, AsyncWrite, Decoder, Encoder};
 
+/// Low-water mark
 const LW: usize = 1024;
+/// High-water mark
 const HW: usize = 8 * 1024;
 
 bitflags::bitflags! {
@@ -34,7 +36,7 @@ pub struct Framed<T, U> {
 impl<T, U> Framed<T, U>
 where
     T: AsyncRead + AsyncWrite,
-    U: Decoder + Encoder,
+    U: Decoder,
 {
     /// Provides a `Stream` and `Sink` interface for reading and writing to this
     /// `Io` object, using `Decode` and `Encode` to read and write the raw data.
@@ -129,7 +131,7 @@ impl<T, U> Framed<T, U> {
     }
 
     /// Consume the `Frame`, returning `Frame` with different codec.
-    pub fn into_framed<U2>(self, codec: U2) -> Framed<T, U2> {
+    pub fn into_framed<U2, I2>(self, codec: U2) -> Framed<T, U2> {
         Framed {
             codec,
             io: self.io,
@@ -140,7 +142,7 @@ impl<T, U> Framed<T, U> {
     }
 
     /// Consume the `Frame`, returning `Frame` with different io.
-    pub fn map_io<F, T2>(self, f: F) -> Framed<T2, U>
+    pub fn map_io<F, T2, I2>(self, f: F) -> Framed<T2, U>
     where
         F: Fn(T) -> T2,
     {
@@ -154,7 +156,7 @@ impl<T, U> Framed<T, U> {
     }
 
     /// Consume the `Frame`, returning `Frame` with different codec.
-    pub fn map_codec<F, U2>(self, f: F) -> Framed<T, U2>
+    pub fn map_codec<F, U2, I2>(self, f: F) -> Framed<T, U2>
     where
         F: Fn(U) -> U2,
     {
@@ -186,10 +188,10 @@ impl<T, U> Framed<T, U> {
 
 impl<T, U> Framed<T, U> {
     /// Serialize item and Write to the inner buffer
-    pub fn write(mut self: Pin<&mut Self>, item: <U as Encoder>::Item) -> Result<(), <U as Encoder>::Error>
+    pub fn write<I>(mut self: Pin<&mut Self>, item: I) -> Result<(), <U as Encoder<I>>::Error>
     where
         T: AsyncWrite,
-        U: Encoder,
+        U: Encoder<I>,
     {
         let this = self.as_mut().project();
         let remaining = this.write_buf.capacity() - this.write_buf.len();
@@ -209,7 +211,10 @@ impl<T, U> Framed<T, U> {
     }
 
     /// Try to read underlying I/O stream and decode item.
-    pub fn next_item(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Option<Result<U::Item, U::Error>>>
+    pub fn next_item(
+        mut self: Pin<&mut Self>,
+        cx: &mut Context<'_>,
+    ) -> Poll<Option<Result<<U as Decoder>::Item, U::Error>>>
     where
         T: AsyncRead,
         U: Decoder,
@@ -266,10 +271,10 @@ impl<T, U> Framed<T, U> {
     }
 
     /// Flush write buffer to underlying I/O stream.
-    pub fn flush(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<(), U::Error>>
+    pub fn flush<I>(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<(), U::Error>>
     where
         T: AsyncWrite,
-        U: Encoder,
+        U: Encoder<I>,
     {
         let mut this = self.as_mut().project();
         log::trace!("flushing framed transport");
@@ -277,9 +282,7 @@ impl<T, U> Framed<T, U> {
         while !this.write_buf.is_empty() {
             log::trace!("writing; remaining={}", this.write_buf.len());
 
-            let n = ready!(
-                this.io.as_mut().poll_write(cx, this.write_buf)
-            )?;
+            let n = ready!(this.io.as_mut().poll_write(cx, this.write_buf))?;
 
             if n == 0 {
                 return Poll::Ready(Err(io::Error::new(
@@ -301,10 +304,10 @@ impl<T, U> Framed<T, U> {
     }
 
     /// Flush write buffer and shutdown underlying I/O stream.
-    pub fn close(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<(), U::Error>>
+    pub fn close<I>(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<(), U::Error>>
     where
         T: AsyncWrite,
-        U: Encoder,
+        U: Encoder<I>,
     {
         let mut this = self.as_mut().project();
         ready!(this.io.as_mut().poll_flush(cx))?;
@@ -325,10 +328,10 @@ where
     }
 }
 
-impl<T, U> Sink<U::Item> for Framed<T, U>
+impl<T, U, I> Sink<I> for Framed<T, U>
 where
     T: AsyncWrite,
-    U: Encoder,
+    U: Encoder<I>,
     U::Error: From<io::Error>,
 {
     type Error = U::Error;
@@ -341,24 +344,15 @@ where
         }
     }
 
-    fn start_send(
-        self: Pin<&mut Self>,
-        item: <U as Encoder>::Item,
-    ) -> Result<(), Self::Error> {
+    fn start_send(self: Pin<&mut Self>, item: I) -> Result<(), Self::Error> {
         self.write(item)
     }
 
-    fn poll_flush(
-        self: Pin<&mut Self>,
-        cx: &mut Context<'_>,
-    ) -> Poll<Result<(), Self::Error>> {
+    fn poll_flush(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
         self.flush(cx)
     }
 
-    fn poll_close(
-        self: Pin<&mut Self>,
-        cx: &mut Context<'_>,
-    ) -> Poll<Result<(), Self::Error>> {
+    fn poll_close(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
         self.close(cx)
     }
 }
diff --git a/actix-codec/src/lib.rs b/actix-codec/src/lib.rs
index 7c38bdf7..3035be13 100644
--- a/actix-codec/src/lib.rs
+++ b/actix-codec/src/lib.rs
@@ -8,7 +8,7 @@
 //! [`AsyncWrite`]: AsyncWrite
 //! [`Sink`]: futures_sink::Sink
 //! [`Stream`]: futures_core::Stream
-#![deny(rust_2018_idioms, warnings)]
+#![deny(rust_2018_idioms)]
 
 mod bcodec;
 mod framed;
diff --git a/actix-ioframe/CHANGES.md b/actix-ioframe/CHANGES.md
deleted file mode 100644
index 1b332a52..00000000
--- a/actix-ioframe/CHANGES.md
+++ /dev/null
@@ -1,33 +0,0 @@
-# Changes
-
-## [0.5.0] - 2019-12-29
-
-* Simplify state management
-
-* Allow to set custom output stream
-
-* Removed disconnect callback
-
-## [0.4.1] - 2019-12-11
-
-* Disconnect callback accepts owned state
-
-## [0.4.0] - 2019-12-11
-
-* Remove `E` param
-
-## [0.3.0-alpha.3] - 2019-12-07
-
-* Migrate to tokio 0.2
-
-## [0.3.0-alpha.2] - 2019-12-02
-
-* Migrate to `std::future`
-
-## [0.1.1] - 2019-10-14
-
-* Re-register task on every dispatcher poll.
-
-## [0.1.0] - 2019-09-25
-
-* Initial release
diff --git a/actix-ioframe/Cargo.toml b/actix-ioframe/Cargo.toml
deleted file mode 100644
index 0cf431a6..00000000
--- a/actix-ioframe/Cargo.toml
+++ /dev/null
@@ -1,33 +0,0 @@
-[package]
-name = "actix-ioframe"
-version = "0.5.0"
-authors = ["Nikolay Kim <fafhrd91@gmail.com>"]
-description = "Actix framed service"
-keywords = ["network", "framework", "async", "futures"]
-homepage = "https://actix.rs"
-repository = "https://github.com/actix/actix-net.git"
-documentation = "https://docs.rs/actix-ioframe/"
-categories = ["network-programming", "asynchronous"]
-license = "MIT OR Apache-2.0"
-edition = "2018"
-
-[lib]
-name = "actix_ioframe"
-path = "src/lib.rs"
-
-[dependencies]
-actix-service = "1.0.1"
-actix-codec = "0.2.0"
-actix-utils = "1.0.4"
-actix-rt = "1.0.0"
-bytes = "0.5.3"
-either = "1.5.3"
-futures-sink = { version = "0.3.4", default-features = false }
-futures-core = { version = "0.3.4", default-features = false }
-pin-project = "0.4.17"
-log = "0.4"
-
-[dev-dependencies]
-actix-connect = "2.0.0-alpha.2"
-actix-testing = "1.0.0"
-futures-util = { version = "0.3.4", default-features = false }
diff --git a/actix-ioframe/LICENSE-APACHE b/actix-ioframe/LICENSE-APACHE
deleted file mode 120000
index 965b606f..00000000
--- a/actix-ioframe/LICENSE-APACHE
+++ /dev/null
@@ -1 +0,0 @@
-../LICENSE-APACHE
\ No newline at end of file
diff --git a/actix-ioframe/LICENSE-MIT b/actix-ioframe/LICENSE-MIT
deleted file mode 120000
index 76219eb7..00000000
--- a/actix-ioframe/LICENSE-MIT
+++ /dev/null
@@ -1 +0,0 @@
-../LICENSE-MIT
\ No newline at end of file
diff --git a/actix-ioframe/README.md b/actix-ioframe/README.md
new file mode 100644
index 00000000..f45c590d
--- /dev/null
+++ b/actix-ioframe/README.md
@@ -0,0 +1,3 @@
+# actix-ioframe
+
+**This crate has been deprecated and removed.**
diff --git a/actix-ioframe/src/connect.rs b/actix-ioframe/src/connect.rs
deleted file mode 100644
index 4e2980d1..00000000
--- a/actix-ioframe/src/connect.rs
+++ /dev/null
@@ -1,123 +0,0 @@
-use std::marker::PhantomData;
-use std::pin::Pin;
-use std::task::{Context, Poll};
-
-use actix_codec::{AsyncRead, AsyncWrite, Decoder, Encoder, Framed};
-use actix_utils::mpsc::Receiver;
-use futures_core::stream::Stream;
-
-pub struct Connect<Io, Codec>
-where
-    Codec: Encoder + Decoder,
-{
-    io: Io,
-    _t: PhantomData<Codec>,
-}
-
-impl<Io, Codec> Connect<Io, Codec>
-where
-    Io: AsyncRead + AsyncWrite,
-    Codec: Encoder + Decoder,
-{
-    pub(crate) fn new(io: Io) -> Self {
-        Self {
-            io,
-            _t: PhantomData,
-        }
-    }
-
-    pub fn codec(
-        self,
-        codec: Codec,
-    ) -> ConnectResult<Io, (), Codec, Receiver<<Codec as Encoder>::Item>> {
-        ConnectResult {
-            state: (),
-            out: None,
-            framed: Framed::new(self.io, codec),
-        }
-    }
-}
-
-#[pin_project::pin_project]
-pub struct ConnectResult<Io, St, Codec: Encoder + Decoder, Out> {
-    pub(crate) state: St,
-    pub(crate) out: Option<Out>,
-    #[pin]
-    pub(crate) framed: Framed<Io, Codec>,
-}
-
-impl<Io, St, Codec: Encoder + Decoder, Out: Unpin> ConnectResult<Io, St, Codec, Out> {
-    #[inline]
-    pub fn get_ref(&self) -> &Io {
-        self.framed.get_ref()
-    }
-
-    #[inline]
-    pub fn get_mut(&mut self) -> &mut Io {
-        self.framed.get_mut()
-    }
-
-    pub fn out<U>(self, out: U) -> ConnectResult<Io, St, Codec, U>
-    where
-        U: Stream<Item = <Codec as Encoder>::Item> + Unpin,
-    {
-        ConnectResult {
-            state: self.state,
-            framed: self.framed,
-            out: Some(out),
-        }
-    }
-
-    #[inline]
-    pub fn state<S>(self, state: S) -> ConnectResult<Io, S, Codec, Out> {
-        ConnectResult {
-            state,
-            framed: self.framed,
-            out: self.out,
-        }
-    }
-}
-
-impl<Io, St, Codec, Out> Stream for ConnectResult<Io, St, Codec, Out>
-where
-    Io: AsyncRead + AsyncWrite,
-    Codec: Encoder + Decoder,
-{
-    type Item = Result<<Codec as Decoder>::Item, <Codec as Decoder>::Error>;
-
-    fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Option<Self::Item>> {
-        self.project().framed.next_item(cx)
-    }
-}
-
-impl<Io, St, Codec, Out> futures_sink::Sink<<Codec as Encoder>::Item>
-    for ConnectResult<Io, St, Codec, Out>
-where
-    Io: AsyncRead + AsyncWrite,
-    Codec: Encoder + Decoder,
-{
-    type Error = <Codec as Encoder>::Error;
-
-    fn poll_ready(mut self: Pin<&mut Self>, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
-        if self.as_mut().project().framed.is_write_ready() {
-            Poll::Ready(Ok(()))
-        } else {
-            Poll::Pending
-        }
-    }
-
-    fn start_send(
-        self: Pin<&mut Self>,
-        item: <Codec as Encoder>::Item,
-    ) -> Result<(), Self::Error> {
-        self.project().framed.write(item)
-    }
-
-    fn poll_flush(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
-        self.as_mut().project().framed.flush(cx)
-    }
-
-    fn poll_close(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
-        self.as_mut().project().framed.close(cx)
-    }
-}
diff --git a/actix-ioframe/src/dispatcher.rs b/actix-ioframe/src/dispatcher.rs
deleted file mode 100644
index b7d5dd9f..00000000
--- a/actix-ioframe/src/dispatcher.rs
+++ /dev/null
@@ -1,248 +0,0 @@
-//! Framed dispatcher service and related utilities
-use std::pin::Pin;
-use std::task::{Context, Poll};
-
-use actix_codec::{AsyncRead, AsyncWrite, Decoder, Encoder, Framed};
-use actix_service::Service;
-use actix_utils::mpsc;
-use futures_core::stream::Stream;
-use pin_project::pin_project;
-use log::debug;
-
-use crate::error::ServiceError;
-
-type Request<U> = <U as Decoder>::Item;
-type Response<U> = <U as Encoder>::Item;
-
-/// FramedTransport - is a future that reads frames from Framed object
-/// and pass then to the service.
-#[pin_project]
-pub(crate) struct Dispatcher<S, T, U, Out>
-where
-    S: Service<Request = Request<U>, Response = Option<Response<U>>>,
-    S::Error: 'static,
-    S::Future: 'static,
-    T: AsyncRead + AsyncWrite,
-    U: Encoder + Decoder,
-    <U as Encoder>::Item: 'static,
-    <U as Encoder>::Error: std::fmt::Debug,
-    Out: Stream<Item = <U as Encoder>::Item> + Unpin,
-{
-    service: S,
-    sink: Option<Out>,
-    state: FramedState<S, U>,
-    #[pin]
-    framed: Framed<T, U>,
-    rx: mpsc::Receiver<Result<<U as Encoder>::Item, S::Error>>,
-}
-
-impl<S, T, U, Out> Dispatcher<S, T, U, Out>
-where
-    S: Service<Request = Request<U>, Response = Option<Response<U>>>,
-    S::Error: 'static,
-    S::Future: 'static,
-    T: AsyncRead + AsyncWrite,
-    U: Decoder + Encoder,
-    <U as Encoder>::Item: 'static,
-    <U as Encoder>::Error: std::fmt::Debug,
-    Out: Stream<Item = <U as Encoder>::Item> + Unpin,
-{
-    pub(crate) fn new(framed: Framed<T, U>, service: S, sink: Option<Out>) -> Self {
-        Dispatcher {
-            sink,
-            service,
-            framed,
-            rx: mpsc::channel().1,
-            state: FramedState::Processing,
-        }
-    }
-}
-
-enum FramedState<S: Service, U: Encoder + Decoder> {
-    Processing,
-    Error(ServiceError<S::Error, U>),
-    FramedError(ServiceError<S::Error, U>),
-    FlushAndStop,
-    Stopping,
-}
-
-impl<S: Service, U: Encoder + Decoder> FramedState<S, U> {
-    fn take_error(&mut self) -> ServiceError<S::Error, U> {
-        match std::mem::replace(self, FramedState::Processing) {
-            FramedState::Error(err) => err,
-            _ => panic!(),
-        }
-    }
-
-    fn take_framed_error(&mut self) -> ServiceError<S::Error, U> {
-        match std::mem::replace(self, FramedState::Processing) {
-            FramedState::FramedError(err) => err,
-            _ => panic!(),
-        }
-    }
-}
-
-impl<S, T, U, Out> Dispatcher<S, T, U, Out>
-where
-    S: Service<Request = Request<U>, Response = Option<Response<U>>>,
-    S::Error: 'static,
-    S::Future: 'static,
-    T: AsyncRead + AsyncWrite,
-    U: Decoder + Encoder,
-    <U as Encoder>::Item: 'static,
-    <U as Encoder>::Error: std::fmt::Debug,
-    Out: Stream<Item = <U as Encoder>::Item> + Unpin,
-{
-    fn poll_read(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> bool {
-        loop {
-            let this = self.as_mut().project();
-            match this.service.poll_ready(cx) {
-                Poll::Ready(Ok(_)) => {
-                    let item = match this.framed.next_item(cx) {
-                        Poll::Ready(Some(Ok(el))) => el,
-                        Poll::Ready(Some(Err(err))) => {
-                            *this.state = FramedState::FramedError(ServiceError::Decoder(err));
-                            return true;
-                        }
-                        Poll::Pending => return false,
-                        Poll::Ready(None) => {
-                            log::trace!("Client disconnected");
-                            *this.state = FramedState::Stopping;
-                            return true;
-                        }
-                    };
-
-                    let tx = this.rx.sender();
-                    let fut = this.service.call(item);
-                    actix_rt::spawn(async move {
-                        let item = fut.await;
-                        let item = match item {
-                            Ok(Some(item)) => Ok(item),
-                            Ok(None) => return,
-                            Err(err) => Err(err),
-                        };
-                        let _ = tx.send(item);
-                    });
-                }
-                Poll::Pending => return false,
-                Poll::Ready(Err(err)) => {
-                    *this.state = FramedState::Error(ServiceError::Service(err));
-                    return true;
-                }
-            }
-        }
-    }
-
-    /// write to framed object
-    fn poll_write(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> bool {
-        loop {
-            let mut this = self.as_mut().project();
-            while !this.framed.is_write_buf_full() {
-                match Pin::new(&mut this.rx).poll_next(cx) {
-                    Poll::Ready(Some(Ok(msg))) => {
-                        if let Err(err) = this.framed.as_mut().write(msg) {
-                            *this.state = FramedState::FramedError(ServiceError::Encoder(err));
-                            return true;
-                        }
-                        continue;
-                    }
-                    Poll::Ready(Some(Err(err))) => {
-                        *this.state = FramedState::Error(ServiceError::Service(err));
-                        return true;
-                    }
-                    Poll::Ready(None) | Poll::Pending => (),
-                }
-
-                if this.sink.is_some() {
-                    match Pin::new(this.sink.as_mut().unwrap()).poll_next(cx) {
-                        Poll::Ready(Some(msg)) => {
-                            if let Err(err) = this.framed.as_mut().write(msg) {
-                                *this.state =
-                                    FramedState::FramedError(ServiceError::Encoder(err));
-                                return true;
-                            }
-                            continue;
-                        }
-                        Poll::Ready(None) => {
-                            let _ = this.sink.take();
-                            *this.state = FramedState::FlushAndStop;
-                            return true;
-                        }
-                        Poll::Pending => (),
-                    }
-                }
-                break;
-            }
-
-            if !this.framed.is_write_buf_empty() {
-                match this.framed.as_mut().flush(cx) {
-                    Poll::Pending => break,
-                    Poll::Ready(Ok(_)) => (),
-                    Poll::Ready(Err(err)) => {
-                        debug!("Error sending data: {:?}", err);
-                        *this.state = FramedState::FramedError(ServiceError::Encoder(err));
-                        return true;
-                    }
-                }
-            } else {
-                break;
-            }
-        }
-        false
-    }
-
-    pub(crate) fn poll(
-        mut self: Pin<&mut Self>,
-        cx: &mut Context<'_>,
-    ) -> Poll<Result<(), ServiceError<S::Error, U>>> {
-        let mut this = self.as_mut().project();
-        match this.state {
-            FramedState::Processing => loop {
-                let read = self.as_mut().poll_read(cx);
-                let write = self.as_mut().poll_write(cx);
-                if read || write {
-                    continue;
-                } else {
-                    return Poll::Pending;
-                }
-            },
-            FramedState::Error(_) => {
-                // flush write buffer
-                if !this.framed.is_write_buf_empty() {
-                    if let Poll::Pending = this.framed.flush(cx) {
-                        return Poll::Pending;
-                    }
-                }
-                Poll::Ready(Err(this.state.take_error()))
-            }
-            FramedState::FlushAndStop => {
-                // drain service responses
-                match Pin::new(this.rx).poll_next(cx) {
-                    Poll::Ready(Some(Ok(msg))) => {
-                        if this.framed.as_mut().write(msg).is_err() {
-                            return Poll::Ready(Ok(()));
-                        }
-                    }
-                    Poll::Ready(Some(Err(_))) => return Poll::Ready(Ok(())),
-                    Poll::Ready(None) | Poll::Pending => (),
-                }
-
-                // flush io
-                if !this.framed.is_write_buf_empty() {
-                    match this.framed.flush(cx) {
-                        Poll::Ready(Err(err)) => {
-                            debug!("Error sending data: {:?}", err);
-                        }
-                        Poll::Pending => {
-                            return Poll::Pending;
-                        }
-                        Poll::Ready(_) => (),
-                    }
-                };
-                Poll::Ready(Ok(()))
-            }
-            FramedState::FramedError(_) => Poll::Ready(Err(this.state.take_framed_error())),
-            FramedState::Stopping => Poll::Ready(Ok(())),
-        }
-    }
-}
diff --git a/actix-ioframe/src/error.rs b/actix-ioframe/src/error.rs
deleted file mode 100644
index 3eb0fed9..00000000
--- a/actix-ioframe/src/error.rs
+++ /dev/null
@@ -1,49 +0,0 @@
-use std::fmt;
-
-use actix_codec::{Decoder, Encoder};
-
-/// Framed service errors
-pub enum ServiceError<E, U: Encoder + Decoder> {
-    /// Inner service error
-    Service(E),
-    /// Encoder parse error
-    Encoder(<U as Encoder>::Error),
-    /// Decoder parse error
-    Decoder(<U as Decoder>::Error),
-}
-
-impl<E, U: Encoder + Decoder> From<E> for ServiceError<E, U> {
-    fn from(err: E) -> Self {
-        ServiceError::Service(err)
-    }
-}
-
-impl<E, U: Encoder + Decoder> fmt::Debug for ServiceError<E, U>
-where
-    E: fmt::Debug,
-    <U as Encoder>::Error: fmt::Debug,
-    <U as Decoder>::Error: fmt::Debug,
-{
-    fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
-        match *self {
-            ServiceError::Service(ref e) => write!(fmt, "ServiceError::Service({:?})", e),
-            ServiceError::Encoder(ref e) => write!(fmt, "ServiceError::Encoder({:?})", e),
-            ServiceError::Decoder(ref e) => write!(fmt, "ServiceError::Encoder({:?})", e),
-        }
-    }
-}
-
-impl<E, U: Encoder + Decoder> fmt::Display for ServiceError<E, U>
-where
-    E: fmt::Display,
-    <U as Encoder>::Error: fmt::Debug,
-    <U as Decoder>::Error: fmt::Debug,
-{
-    fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
-        match *self {
-            ServiceError::Service(ref e) => write!(fmt, "{}", e),
-            ServiceError::Encoder(ref e) => write!(fmt, "{:?}", e),
-            ServiceError::Decoder(ref e) => write!(fmt, "{:?}", e),
-        }
-    }
-}
diff --git a/actix-ioframe/src/lib.rs b/actix-ioframe/src/lib.rs
deleted file mode 100644
index 3f82a29f..00000000
--- a/actix-ioframe/src/lib.rs
+++ /dev/null
@@ -1,11 +0,0 @@
-// #![deny(rust_2018_idioms, warnings)]
-#![allow(clippy::type_complexity, clippy::too_many_arguments)]
-
-mod connect;
-mod dispatcher;
-mod error;
-mod service;
-
-pub use self::connect::{Connect, ConnectResult};
-pub use self::error::ServiceError;
-pub use self::service::{Builder, FactoryBuilder};
diff --git a/actix-ioframe/src/service.rs b/actix-ioframe/src/service.rs
deleted file mode 100644
index f3b5ab85..00000000
--- a/actix-ioframe/src/service.rs
+++ /dev/null
@@ -1,413 +0,0 @@
-use std::future::Future;
-use std::marker::PhantomData;
-use std::pin::Pin;
-use std::rc::Rc;
-use std::task::{Context, Poll};
-
-use actix_codec::{AsyncRead, AsyncWrite, Decoder, Encoder, Framed};
-use actix_service::{IntoService, IntoServiceFactory, Service, ServiceFactory};
-use either::Either;
-use futures_core::{ready, stream::Stream};
-
-use crate::connect::{Connect, ConnectResult};
-use crate::dispatcher::Dispatcher;
-use crate::error::ServiceError;
-
-type RequestItem<U> = <U as Decoder>::Item;
-type ResponseItem<U> = Option<<U as Encoder>::Item>;
-
-/// Service builder - structure that follows the builder pattern
-/// for building instances for framed services.
-pub struct Builder<St, C, Io, Codec, Out> {
-    connect: C,
-    _t: PhantomData<(St, Io, Codec, Out)>,
-}
-
-impl<St, C, Io, Codec, Out> Builder<St, C, Io, Codec, Out>
-where
-    C: Service<Request = Connect<Io, Codec>, Response = ConnectResult<Io, St, Codec, Out>>,
-    Io: AsyncRead + AsyncWrite,
-    Codec: Decoder + Encoder,
-    <Codec as Encoder>::Item: 'static,
-    <Codec as Encoder>::Error: std::fmt::Debug,
-    Out: Stream<Item = <Codec as Encoder>::Item> + Unpin,
-{
-    /// Construct framed handler service with specified connect service
-    pub fn new<F>(connect: F) -> Builder<St, C, Io, Codec, Out>
-    where
-        F: IntoService<C>,
-        Io: AsyncRead + AsyncWrite,
-        C: Service<Request = Connect<Io, Codec>, Response = ConnectResult<Io, St, Codec, Out>>,
-        Codec: Decoder + Encoder,
-        Out: Stream<Item = <Codec as Encoder>::Item>,
-    {
-        Builder {
-            connect: connect.into_service(),
-            _t: PhantomData,
-        }
-    }
-
-    /// Provide stream items handler service and construct service factory.
-    pub fn build<F, T>(self, service: F) -> FramedServiceImpl<St, C, T, Io, Codec, Out>
-    where
-        F: IntoServiceFactory<T>,
-        T: ServiceFactory<
-            Config = St,
-            Request = RequestItem<Codec>,
-            Response = ResponseItem<Codec>,
-            Error = C::Error,
-            InitError = C::Error,
-        >,
-    {
-        FramedServiceImpl {
-            connect: self.connect,
-            handler: Rc::new(service.into_factory()),
-            _t: PhantomData,
-        }
-    }
-}
-
-/// Service builder - structure that follows the builder pattern
-/// for building instances for framed services.
-pub struct FactoryBuilder<St, C, Io, Codec, Out> {
-    connect: C,
-    _t: PhantomData<(St, Io, Codec, Out)>,
-}
-
-impl<St, C, Io, Codec, Out> FactoryBuilder<St, C, Io, Codec, Out>
-where
-    Io: AsyncRead + AsyncWrite,
-    C: ServiceFactory<
-        Config = (),
-        Request = Connect<Io, Codec>,
-        Response = ConnectResult<Io, St, Codec, Out>,
-    >,
-    Codec: Decoder + Encoder,
-    <Codec as Encoder>::Error: std::fmt::Debug,
-    Out: Stream<Item = <Codec as Encoder>::Item> + Unpin,
-{
-    /// Construct framed handler new service with specified connect service
-    pub fn new<F>(connect: F) -> FactoryBuilder<St, C, Io, Codec, Out>
-    where
-        F: IntoServiceFactory<C>,
-        Io: AsyncRead + AsyncWrite,
-        C: ServiceFactory<
-            Config = (),
-            Request = Connect<Io, Codec>,
-            Response = ConnectResult<Io, St, Codec, Out>,
-        >,
-        Codec: Decoder + Encoder,
-        Out: Stream<Item = <Codec as Encoder>::Item> + Unpin,
-    {
-        FactoryBuilder {
-            connect: connect.into_factory(),
-            _t: PhantomData,
-        }
-    }
-
-    pub fn build<F, T, Cfg>(self, service: F) -> FramedService<St, C, T, Io, Codec, Out, Cfg>
-    where
-        F: IntoServiceFactory<T>,
-        T: ServiceFactory<
-            Config = St,
-            Request = RequestItem<Codec>,
-            Response = ResponseItem<Codec>,
-            Error = C::Error,
-            InitError = C::Error,
-        >,
-    {
-        FramedService {
-            connect: self.connect,
-            handler: Rc::new(service.into_factory()),
-            _t: PhantomData,
-        }
-    }
-}
-
-pub struct FramedService<St, C, T, Io, Codec, Out, Cfg> {
-    connect: C,
-    handler: Rc<T>,
-    _t: PhantomData<(St, Io, Codec, Out, Cfg)>,
-}
-
-impl<St, C, T, Io, Codec, Out, Cfg> ServiceFactory
-    for FramedService<St, C, T, Io, Codec, Out, Cfg>
-where
-    Io: AsyncRead + AsyncWrite,
-    C: ServiceFactory<
-        Config = (),
-        Request = Connect<Io, Codec>,
-        Response = ConnectResult<Io, St, Codec, Out>,
-    >,
-    T: ServiceFactory<
-        Config = St,
-        Request = RequestItem<Codec>,
-        Response = ResponseItem<Codec>,
-        Error = C::Error,
-        InitError = C::Error,
-    >,
-    <T::Service as Service>::Error: 'static,
-    <T::Service as Service>::Future: 'static,
-    Codec: Decoder + Encoder,
-    <Codec as Encoder>::Item: 'static,
-    <Codec as Encoder>::Error: std::fmt::Debug,
-    Out: Stream<Item = <Codec as Encoder>::Item> + Unpin,
-{
-    type Config = Cfg;
-    type Request = Io;
-    type Response = ();
-    type Error = ServiceError<C::Error, Codec>;
-    type InitError = C::InitError;
-    type Service = FramedServiceImpl<St, C::Service, T, Io, Codec, Out>;
-    type Future = FramedServiceResponse<St, C, T, Io, Codec, Out>;
-
-    fn new_service(&self, _: Cfg) -> Self::Future {
-        // create connect service and then create service impl
-        FramedServiceResponse {
-            fut: self.connect.new_service(()),
-            handler: self.handler.clone(),
-        }
-    }
-}
-
-#[pin_project::pin_project]
-pub struct FramedServiceResponse<St, C, T, Io, Codec, Out>
-where
-    Io: AsyncRead + AsyncWrite,
-    C: ServiceFactory<
-        Config = (),
-        Request = Connect<Io, Codec>,
-        Response = ConnectResult<Io, St, Codec, Out>,
-    >,
-    T: ServiceFactory<
-        Config = St,
-        Request = RequestItem<Codec>,
-        Response = ResponseItem<Codec>,
-        Error = C::Error,
-        InitError = C::Error,
-    >,
-    <T::Service as Service>::Error: 'static,
-    <T::Service as Service>::Future: 'static,
-    Codec: Decoder + Encoder,
-    <Codec as Encoder>::Item: 'static,
-    <Codec as Encoder>::Error: std::fmt::Debug,
-    Out: Stream<Item = <Codec as Encoder>::Item> + Unpin,
-{
-    #[pin]
-    fut: C::Future,
-    handler: Rc<T>,
-}
-
-impl<St, C, T, Io, Codec, Out> Future for FramedServiceResponse<St, C, T, Io, Codec, Out>
-where
-    Io: AsyncRead + AsyncWrite,
-    C: ServiceFactory<
-        Config = (),
-        Request = Connect<Io, Codec>,
-        Response = ConnectResult<Io, St, Codec, Out>,
-    >,
-    T: ServiceFactory<
-        Config = St,
-        Request = RequestItem<Codec>,
-        Response = ResponseItem<Codec>,
-        Error = C::Error,
-        InitError = C::Error,
-    >,
-    <T::Service as Service>::Error: 'static,
-    <T::Service as Service>::Future: 'static,
-    Codec: Decoder + Encoder,
-    <Codec as Encoder>::Item: 'static,
-    <Codec as Encoder>::Error: std::fmt::Debug,
-    Out: Stream<Item = <Codec as Encoder>::Item> + Unpin,
-{
-    type Output = Result<FramedServiceImpl<St, C::Service, T, Io, Codec, Out>, C::InitError>;
-
-    fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
-        let this = self.project();
-        let connect = ready!(this.fut.poll(cx))?;
-
-        Poll::Ready(Ok(FramedServiceImpl {
-            connect,
-            handler: this.handler.clone(),
-            _t: PhantomData,
-        }))
-    }
-}
-
-pub struct FramedServiceImpl<St, C, T, Io, Codec, Out> {
-    connect: C,
-    handler: Rc<T>,
-    _t: PhantomData<(St, Io, Codec, Out)>,
-}
-
-impl<St, C, T, Io, Codec, Out> Service for FramedServiceImpl<St, C, T, Io, Codec, Out>
-where
-    Io: AsyncRead + AsyncWrite,
-    C: Service<Request = Connect<Io, Codec>, Response = ConnectResult<Io, St, Codec, Out>>,
-    T: ServiceFactory<
-        Config = St,
-        Request = RequestItem<Codec>,
-        Response = ResponseItem<Codec>,
-        Error = C::Error,
-        InitError = C::Error,
-    >,
-    <T::Service as Service>::Error: 'static,
-    <T::Service as Service>::Future: 'static,
-    Codec: Decoder + Encoder,
-    <Codec as Encoder>::Item: 'static,
-    <Codec as Encoder>::Error: std::fmt::Debug,
-    Out: Stream<Item = <Codec as Encoder>::Item> + Unpin,
-{
-    type Request = Io;
-    type Response = ();
-    type Error = ServiceError<C::Error, Codec>;
-    type Future = FramedServiceImplResponse<St, Io, Codec, Out, C, T>;
-
-    fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
-        self.connect.poll_ready(cx).map_err(|e| e.into())
-    }
-
-    fn call(&mut self, req: Io) -> Self::Future {
-        FramedServiceImplResponse {
-            inner: FramedServiceImplResponseInner::Connect(
-                self.connect.call(Connect::new(req)),
-                self.handler.clone(),
-            ),
-        }
-    }
-}
-
-#[pin_project::pin_project]
-pub struct FramedServiceImplResponse<St, Io, Codec, Out, C, T>
-where
-    C: Service<Request = Connect<Io, Codec>, Response = ConnectResult<Io, St, Codec, Out>>,
-    T: ServiceFactory<
-        Config = St,
-        Request = RequestItem<Codec>,
-        Response = ResponseItem<Codec>,
-        Error = C::Error,
-        InitError = C::Error,
-    >,
-    <T::Service as Service>::Error: 'static,
-    <T::Service as Service>::Future: 'static,
-    Io: AsyncRead + AsyncWrite,
-    Codec: Encoder + Decoder,
-    <Codec as Encoder>::Item: 'static,
-    <Codec as Encoder>::Error: std::fmt::Debug,
-    Out: Stream<Item = <Codec as Encoder>::Item> + Unpin,
-{
-    #[pin]
-    inner: FramedServiceImplResponseInner<St, Io, Codec, Out, C, T>,
-}
-
-impl<St, Io, Codec, Out, C, T> Future for FramedServiceImplResponse<St, Io, Codec, Out, C, T>
-where
-    C: Service<Request = Connect<Io, Codec>, Response = ConnectResult<Io, St, Codec, Out>>,
-    T: ServiceFactory<
-        Config = St,
-        Request = RequestItem<Codec>,
-        Response = ResponseItem<Codec>,
-        Error = C::Error,
-        InitError = C::Error,
-    >,
-    <T::Service as Service>::Error: 'static,
-    <T::Service as Service>::Future: 'static,
-    Io: AsyncRead + AsyncWrite,
-    Codec: Encoder + Decoder,
-    <Codec as Encoder>::Item: 'static,
-    <Codec as Encoder>::Error: std::fmt::Debug,
-    Out: Stream<Item = <Codec as Encoder>::Item> + Unpin,
-{
-    type Output = Result<(), ServiceError<C::Error, Codec>>;
-
-    fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
-        let mut this = self.as_mut().project();
-
-        loop {
-            match this.inner.poll(cx) {
-                Either::Left(new) => {
-                    this = self.as_mut().project();
-                    this.inner.set(new)
-                }
-                Either::Right(poll) => return poll,
-            };
-        }
-    }
-}
-
-#[pin_project::pin_project(project = FramedServiceImplResponseInnerProj)]
-enum FramedServiceImplResponseInner<St, Io, Codec, Out, C, T>
-where
-    C: Service<Request = Connect<Io, Codec>, Response = ConnectResult<Io, St, Codec, Out>>,
-    T: ServiceFactory<
-        Config = St,
-        Request = RequestItem<Codec>,
-        Response = ResponseItem<Codec>,
-        Error = C::Error,
-        InitError = C::Error,
-    >,
-    <T::Service as Service>::Error: 'static,
-    <T::Service as Service>::Future: 'static,
-    Io: AsyncRead + AsyncWrite,
-    Codec: Encoder + Decoder,
-    <Codec as Encoder>::Item: 'static,
-    <Codec as Encoder>::Error: std::fmt::Debug,
-    Out: Stream<Item = <Codec as Encoder>::Item> + Unpin,
-{
-    Connect(#[pin] C::Future, Rc<T>),
-    Handler(#[pin] T::Future, Option<Framed<Io, Codec>>, Option<Out>),
-    Dispatcher(#[pin] Dispatcher<T::Service, Io, Codec, Out>),
-}
-
-impl<St, Io, Codec, Out, C, T> FramedServiceImplResponseInner<St, Io, Codec, Out, C, T>
-where
-    C: Service<Request = Connect<Io, Codec>, Response = ConnectResult<Io, St, Codec, Out>>,
-    T: ServiceFactory<
-        Config = St,
-        Request = RequestItem<Codec>,
-        Response = ResponseItem<Codec>,
-        Error = C::Error,
-        InitError = C::Error,
-    >,
-    <T::Service as Service>::Error: 'static,
-    <T::Service as Service>::Future: 'static,
-    Io: AsyncRead + AsyncWrite,
-    Codec: Encoder + Decoder,
-    <Codec as Encoder>::Item: 'static,
-    <Codec as Encoder>::Error: std::fmt::Debug,
-    Out: Stream<Item = <Codec as Encoder>::Item> + Unpin,
-{
-    fn poll(
-        self: Pin<&mut Self>,
-        cx: &mut Context<'_>,
-    ) -> Either<
-        FramedServiceImplResponseInner<St, Io, Codec, Out, C, T>,
-        Poll<Result<(), ServiceError<C::Error, Codec>>>,
-    > {
-        match self.project() {
-            FramedServiceImplResponseInnerProj::Connect(fut, handler) => match fut.poll(cx) {
-                Poll::Ready(Ok(res)) => Either::Left(FramedServiceImplResponseInner::Handler(
-                    handler.new_service(res.state),
-                    Some(res.framed),
-                    res.out,
-                )),
-                Poll::Pending => Either::Right(Poll::Pending),
-                Poll::Ready(Err(e)) => Either::Right(Poll::Ready(Err(e.into()))),
-            },
-            FramedServiceImplResponseInnerProj::Handler(fut, framed, out) => {
-                match fut.poll(cx) {
-                    Poll::Ready(Ok(handler)) => {
-                        Either::Left(FramedServiceImplResponseInner::Dispatcher(
-                            Dispatcher::new(framed.take().unwrap(), handler, out.take()),
-                        ))
-                    }
-                    Poll::Pending => Either::Right(Poll::Pending),
-                    Poll::Ready(Err(e)) => Either::Right(Poll::Ready(Err(e.into()))),
-                }
-            }
-            FramedServiceImplResponseInnerProj::Dispatcher(fut) => {
-                Either::Right(fut.poll(cx))
-            }
-        }
-    }
-}
diff --git a/actix-ioframe/tests/test_server.rs b/actix-ioframe/tests/test_server.rs
deleted file mode 100644
index 9d3775b3..00000000
--- a/actix-ioframe/tests/test_server.rs
+++ /dev/null
@@ -1,55 +0,0 @@
-use std::cell::Cell;
-use std::rc::Rc;
-
-use actix_codec::BytesCodec;
-use actix_service::{fn_factory_with_config, fn_service, IntoService, Service};
-use actix_testing::TestServer;
-use actix_utils::mpsc;
-use bytes::{Bytes, BytesMut};
-use futures_util::future::ok;
-
-use actix_ioframe::{Builder, Connect, FactoryBuilder};
-
-#[derive(Clone)]
-struct State(Option<mpsc::Sender<Bytes>>);
-
-#[actix_rt::test]
-async fn test_basic() {
-    let client_item = Rc::new(Cell::new(false));
-
-    let srv = TestServer::with(move || {
-        FactoryBuilder::new(fn_service(|conn: Connect<_, _>| {
-            ok(conn.codec(BytesCodec).state(State(None)))
-        }))
-        // echo
-        .build(fn_service(|t: BytesMut| ok(Some(t.freeze()))))
-    });
-
-    let item = client_item.clone();
-    let mut client = Builder::new(fn_service(move |conn: Connect<_, _>| {
-        async move {
-            let (tx, rx) = mpsc::channel();
-            let _ = tx.send(Bytes::from_static(b"Hello"));
-            Ok(conn.codec(BytesCodec).out(rx).state(State(Some(tx))))
-        }
-    }))
-    .build(fn_factory_with_config(move |mut cfg: State| {
-        let item = item.clone();
-        ok((move |t: BytesMut| {
-            assert_eq!(t.freeze(), Bytes::from_static(b"Hello"));
-            item.set(true);
-            // drop Sender, which will close connection
-            cfg.0.take();
-            ok::<_, ()>(None)
-        })
-        .into_service())
-    }));
-
-    let conn = actix_connect::default_connector()
-        .call(actix_connect::Connect::with(String::new(), srv.addr()))
-        .await
-        .unwrap();
-
-    client.call(conn.into_parts().0).await.unwrap();
-    assert!(client_item.get());
-}
diff --git a/actix-utils/CHANGES.md b/actix-utils/CHANGES.md
index 4a5ec485..0c036f67 100644
--- a/actix-utils/CHANGES.md
+++ b/actix-utils/CHANGES.md
@@ -1,5 +1,8 @@
 # Changes
 
+## Unreleased - 2020-xx-xx
+* Upgrade `tokio-util` to `0.3`.
+
 ## [1.0.6] - 2020-01-08
 
 * Add `Clone` impl for `condition::Waiter`
diff --git a/actix-utils/src/framed.rs b/actix-utils/src/framed.rs
index 1663db9d..fef70ff0 100644
--- a/actix-utils/src/framed.rs
+++ b/actix-utils/src/framed.rs
@@ -6,31 +6,28 @@ use std::{fmt, mem};
 
 use actix_codec::{AsyncRead, AsyncWrite, Decoder, Encoder, Framed};
 use actix_service::{IntoService, Service};
-use futures_util::{future::Future, FutureExt, stream::Stream};
+use futures_util::{future::Future, stream::Stream, FutureExt};
 use log::debug;
 
 use crate::mpsc;
 
-type Request<U> = <U as Decoder>::Item;
-type Response<U> = <U as Encoder>::Item;
-
 /// Framed transport errors
-pub enum DispatcherError<E, U: Encoder + Decoder> {
+pub enum DispatcherError<E, U: Encoder<I> + Decoder, I> {
     Service(E),
-    Encoder(<U as Encoder>::Error),
+    Encoder(<U as Encoder<I>>::Error),
     Decoder(<U as Decoder>::Error),
 }
 
-impl<E, U: Encoder + Decoder> From<E> for DispatcherError<E, U> {
+impl<E, U: Encoder<I> + Decoder, I> From<E> for DispatcherError<E, U, I> {
     fn from(err: E) -> Self {
         DispatcherError::Service(err)
     }
 }
 
-impl<E, U: Encoder + Decoder> fmt::Debug for DispatcherError<E, U>
+impl<E, U: Encoder<I> + Decoder, I> fmt::Debug for DispatcherError<E, U, I>
 where
     E: fmt::Debug,
-    <U as Encoder>::Error: fmt::Debug,
+    <U as Encoder<I>>::Error: fmt::Debug,
     <U as Decoder>::Error: fmt::Debug,
 {
     fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
@@ -42,10 +39,10 @@ where
     }
 }
 
-impl<E, U: Encoder + Decoder> fmt::Display for DispatcherError<E, U>
+impl<E, U: Encoder<I> + Decoder, I> fmt::Display for DispatcherError<E, U, I>
 where
     E: fmt::Display,
-    <U as Encoder>::Error: fmt::Debug,
+    <U as Encoder<I>>::Error: fmt::Debug,
     <U as Decoder>::Error: fmt::Debug,
 {
     fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
@@ -62,44 +59,44 @@ pub enum Message<T> {
     Close,
 }
 
-/// FramedTransport - is a future that reads frames from Framed object
-/// and pass then to the service.
+/// Dispatcher is a future that reads frames from Framed object
+/// and passes them to the service.
 #[pin_project::pin_project]
-pub struct Dispatcher<S, T, U>
+pub struct Dispatcher<S, T, U, I>
 where
-    S: Service<Request = Request<U>, Response = Response<U>>,
+    S: Service<Request = <U as Decoder>::Item, Response = I>,
     S::Error: 'static,
     S::Future: 'static,
     T: AsyncRead + AsyncWrite,
-    U: Encoder + Decoder,
-    <U as Encoder>::Item: 'static,
-    <U as Encoder>::Error: std::fmt::Debug,
+    U: Encoder<I> + Decoder,
+    I: 'static,
+    <U as Encoder<I>>::Error: std::fmt::Debug,
 {
     service: S,
-    state: State<S, U>,
+    state: State<S, U, I>,
     #[pin]
     framed: Framed<T, U>,
-    rx: mpsc::Receiver<Result<Message<<U as Encoder>::Item>, S::Error>>,
-    tx: mpsc::Sender<Result<Message<<U as Encoder>::Item>, S::Error>>,
+    rx: mpsc::Receiver<Result<Message<I>, S::Error>>,
+    tx: mpsc::Sender<Result<Message<I>, S::Error>>,
 }
 
-enum State<S: Service, U: Encoder + Decoder> {
+enum State<S: Service, U: Encoder<I> + Decoder, I> {
     Processing,
-    Error(DispatcherError<S::Error, U>),
-    FramedError(DispatcherError<S::Error, U>),
+    Error(DispatcherError<S::Error, U, I>),
+    FramedError(DispatcherError<S::Error, U, I>),
     FlushAndStop,
     Stopping,
 }
 
-impl<S: Service, U: Encoder + Decoder> State<S, U> {
-    fn take_error(&mut self) -> DispatcherError<S::Error, U> {
+impl<S: Service, U: Encoder<I> + Decoder, I> State<S, U, I> {
+    fn take_error(&mut self) -> DispatcherError<S::Error, U, I> {
         match mem::replace(self, State::Processing) {
             State::Error(err) => err,
             _ => panic!(),
         }
     }
 
-    fn take_framed_error(&mut self) -> DispatcherError<S::Error, U> {
+    fn take_framed_error(&mut self) -> DispatcherError<S::Error, U, I> {
         match mem::replace(self, State::Processing) {
             State::FramedError(err) => err,
             _ => panic!(),
@@ -107,15 +104,16 @@ impl<S: Service, U: Encoder + Decoder> State<S, U> {
     }
 }
 
-impl<S, T, U> Dispatcher<S, T, U>
+impl<S, T, U, I> Dispatcher<S, T, U, I>
 where
-    S: Service<Request = Request<U>, Response = Response<U>>,
+    S: Service<Request = <U as Decoder>::Item, Response = I>,
     S::Error: 'static,
     S::Future: 'static,
     T: AsyncRead + AsyncWrite,
-    U: Decoder + Encoder,
-    <U as Encoder>::Item: 'static,
-    <U as Encoder>::Error: std::fmt::Debug,
+    U: Decoder + Encoder<I>,
+    I: 'static,
+    <U as Decoder>::Error: std::fmt::Debug,
+    <U as Encoder<I>>::Error: std::fmt::Debug,
 {
     pub fn new<F: IntoService<S>>(framed: Framed<T, U>, service: F) -> Self {
         let (tx, rx) = mpsc::channel();
@@ -132,7 +130,7 @@ where
     pub fn with_rx<F: IntoService<S>>(
         framed: Framed<T, U>,
         service: F,
-        rx: mpsc::Receiver<Result<Message<<U as Encoder>::Item>, S::Error>>,
+        rx: mpsc::Receiver<Result<Message<I>, S::Error>>,
     ) -> Self {
         let tx = rx.sender();
         Dispatcher {
@@ -145,7 +143,7 @@ where
     }
 
     /// Get sink
-    pub fn get_sink(&self) -> mpsc::Sender<Result<Message<<U as Encoder>::Item>, S::Error>> {
+    pub fn get_sink(&self) -> mpsc::Sender<Result<Message<I>, S::Error>> {
         self.tx.clone()
     }
 
@@ -172,13 +170,13 @@ where
 
     fn poll_read(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> bool
     where
-        S: Service<Request = Request<U>, Response = Response<U>>,
+        S: Service<Request = <U as Decoder>::Item, Response = I>,
         S::Error: 'static,
         S::Future: 'static,
         T: AsyncRead + AsyncWrite,
-        U: Decoder + Encoder,
-        <U as Encoder>::Item: 'static,
-        <U as Encoder>::Error: std::fmt::Debug,
+        U: Decoder + Encoder<I>,
+        I: 'static,
+        <U as Encoder<I>>::Error: std::fmt::Debug,
     {
         loop {
             let this = self.as_mut().project();
@@ -214,13 +212,13 @@ where
     /// write to framed object
     fn poll_write(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> bool
     where
-        S: Service<Request = Request<U>, Response = Response<U>>,
+        S: Service<Request = <U as Decoder>::Item, Response = I>,
         S::Error: 'static,
         S::Future: 'static,
         T: AsyncRead + AsyncWrite,
-        U: Decoder + Encoder,
-        <U as Encoder>::Item: 'static,
-        <U as Encoder>::Error: std::fmt::Debug,
+        U: Decoder + Encoder<I>,
+        I: 'static,
+        <U as Encoder<I>>::Error: std::fmt::Debug,
     {
         loop {
             let mut this = self.as_mut().project();
@@ -263,18 +261,18 @@ where
     }
 }
 
-impl<S, T, U> Future for Dispatcher<S, T, U>
+impl<S, T, U, I> Future for Dispatcher<S, T, U, I>
 where
-    S: Service<Request = Request<U>, Response = Response<U>>,
+    S: Service<Request = <U as Decoder>::Item, Response = I>,
     S::Error: 'static,
     S::Future: 'static,
     T: AsyncRead + AsyncWrite,
-    U: Decoder + Encoder,
-    <U as Encoder>::Item: 'static,
-    <U as Encoder>::Error: std::fmt::Debug,
+    U: Decoder + Encoder<I>,
+    I: 'static,
+    <U as Encoder<I>>::Error: std::fmt::Debug,
     <U as Decoder>::Error: std::fmt::Debug,
 {
-    type Output = Result<(), DispatcherError<S::Error, U>>;
+    type Output = Result<(), DispatcherError<S::Error, U, I>>;
 
     fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
         loop {
diff --git a/actix-utils/src/lib.rs b/actix-utils/src/lib.rs
index c4d56c56..3c66accc 100644
--- a/actix-utils/src/lib.rs
+++ b/actix-utils/src/lib.rs
@@ -1,5 +1,5 @@
 //! Actix utils - various helper services
-#![deny(rust_2018_idioms, warnings)]
+#![deny(rust_2018_idioms)]
 #![allow(clippy::type_complexity)]
 
 mod cell;