diff --git a/.travis.yml b/.travis.yml
index fb8294c..b3d59de 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -19,13 +19,13 @@ matrix:
 
         # rustls-tls
         #- rust: stable
-        - rust: nightly
-          env: FEATURES="--no-default-features --features rustls-tls"
+        #- rust: nightly
+        #  env: FEATURES="--no-default-features --features rustls-tls"
 
         # default-tls and rustls-tls
         #- rust: stable
-        - rust: nightly
-          env: FEATURES="--features rustls-tls"
+        #- rust: nightly
+        #  env: FEATURES="--features rustls-tls"
 
         # optional cookies
         #- rust: stable
diff --git a/Cargo.toml b/Cargo.toml
index b3395f5..3dfa788 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -24,13 +24,14 @@ encoding_rs = "0.8"
 futures-core-preview = { version = "=0.3.0-alpha.18" }
 futures-util-preview = { version = "=0.3.0-alpha.18" }
 http = "0.1.15"
-hyper = "=0.13.0-alpha.1"
+http-body = "=0.2.0-alpha.1"
+hyper = "=0.13.0-alpha.2"
 log = "0.4"
 mime = "0.3.7"
 mime_guess = "2.0"
 percent-encoding = "2.1"
-tokio = { version = "=0.2.0-alpha.4", default-features = false, features = ["rt-full", "tcp"] }
-tokio-executor = "=0.2.0-alpha.4"
+tokio = { version = "=0.2.0-alpha.5", default-features = false, features = ["rt-full", "tcp"] }
+tokio-executor = "=0.2.0-alpha.5"
 url = "2.1"
 uuid = { version = "0.7", features = ["v4"] }
 time = "0.1.42"
@@ -45,15 +46,15 @@ serde_urlencoded = "0.6.1"
 # Optional deps...
 
 ## default-tls
-hyper-tls = { version = "=0.4.0-alpha.1", optional = true }
+hyper-tls = { version = "=0.4.0-alpha.2", optional = true }
 native-tls = { version = "0.2", optional = true }
-tokio-tls = { version = "=0.3.0-alpha.4", optional = true }
+tokio-tls = { version = "=0.3.0-alpha.5", optional = true }
 
 ## rustls-tls
-hyper-rustls = { version = "=0.18.0-alpha.1", optional = true }
-rustls = { version = "0.16", features = ["dangerous_configuration"], optional = true }
-tokio-rustls = { version = "=0.12.0-alpha.2", optional = true }
-webpki-roots = { version = "0.17", optional = true }
+#hyper-rustls = { version = "=0.18.0-alpha.1", optional = true }
+#rustls = { version = "0.16", features = ["dangerous_configuration"], optional = true }
+#tokio-rustls = { version = "=0.12.0-alpha.2", optional = true }
+#webpki-roots = { version = "0.17", optional = true }
 
 ## blocking
 futures-channel-preview = { version = "=0.3.0-alpha.18", optional = true }
@@ -73,11 +74,11 @@ async-compression = { version = "0.1.0-alpha.4", default-features = false, featu
 
 [dev-dependencies]
 env_logger = "0.6"
+hyper = { version = "=0.13.0-alpha.2", features = ["unstable-stream"] }
 serde = { version = "1.0", features = ["derive"] }
 libflate = "0.1"
 doc-comment = "0.3"
-bytes = "0.4"
-tokio-fs = { version = "=0.2.0-alpha.4" }
+tokio-fs = { version = "=0.2.0-alpha.5" }
 
 [features]
 default = ["default-tls"]
@@ -87,7 +88,8 @@ tls = []
 default-tls = ["hyper-tls", "native-tls", "tls", "tokio-tls"]
 default-tls-vendored = ["default-tls", "native-tls/vendored"]
 
-rustls-tls = ["hyper-rustls", "tokio-rustls", "webpki-roots", "rustls", "tls"]
+# re-enable CI also
+#rustls-tls = ["hyper-rustls", "tokio-rustls", "webpki-roots", "rustls", "tls"]
 
 blocking = ["futures-channel-preview", "futures-util-preview/io"]
 
diff --git a/src/async_impl/body.rs b/src/async_impl/body.rs
index 4919910..e26918d 100644
--- a/src/async_impl/body.rs
+++ b/src/async_impl/body.rs
@@ -1,10 +1,12 @@
-use bytes::Bytes;
-use futures_core::Stream;
-use hyper::body::Payload;
 use std::fmt;
 use std::future::Future;
 use std::pin::Pin;
 use std::task::{Context, Poll};
+
+use bytes::Bytes;
+use futures_core::Stream;
+use futures_util::TryStreamExt;
+use http_body::Body as HttpBody;
 use tokio::timer::Delay;
 
 /// An asynchronous request body.
@@ -17,12 +19,22 @@ pub(crate) struct ImplStream(Body);
 
 enum Inner {
     Reusable(Bytes),
-    Hyper {
-        body: hyper::Body,
+    Streaming {
+        body: Pin<
+            Box<
+                dyn HttpBody<Data = hyper::Chunk, Error = Box<dyn std::error::Error + Send + Sync>>
+                    + Send
+                    + Sync,
+            >,
+        >,
         timeout: Option<Delay>,
     },
 }
 
+struct WrapStream<S>(S);
+
+struct WrapHyper(hyper::Body);
+
 impl Body {
     /// Wrap a futures `Stream` in a box inside `Body`.
     ///
@@ -49,27 +61,38 @@ impl Body {
         S::Error: Into<Box<dyn std::error::Error + Send + Sync>>,
         hyper::Chunk: From<S::Ok>,
     {
-        Body::wrap(hyper::body::Body::wrap_stream(stream))
-    }
-
-    pub(crate) fn response(body: hyper::Body, timeout: Option<Delay>) -> Body {
+        let body = Box::pin(WrapStream(
+            stream.map_ok(hyper::Chunk::from).map_err(Into::into),
+        ));
         Body {
-            inner: Inner::Hyper { body, timeout },
-        }
-    }
-
-    pub(crate) fn wrap(body: hyper::Body) -> Body {
-        Body {
-            inner: Inner::Hyper {
+            inner: Inner::Streaming {
                 body,
                 timeout: None,
             },
         }
     }
 
-    #[cfg(any(feature = "blocking", feature = "gzip",))]
+    pub(crate) fn response(body: hyper::Body, timeout: Option<Delay>) -> Body {
+        Body {
+            inner: Inner::Streaming {
+                body: Box::pin(WrapHyper(body)),
+                timeout,
+            },
+        }
+    }
+
+    #[cfg(feature = "blocking")]
+    pub(crate) fn wrap(body: hyper::Body) -> Body {
+        Body {
+            inner: Inner::Streaming {
+                body: Box::pin(WrapHyper(body)),
+                timeout: None,
+            },
+        }
+    }
+
     pub(crate) fn empty() -> Body {
-        Body::wrap(hyper::Body::empty())
+        Body::reusable(Bytes::new())
     }
 
     pub(crate) fn reusable(chunk: Bytes) -> Body {
@@ -78,14 +101,13 @@ impl Body {
         }
     }
 
-    pub(crate) fn into_hyper(self) -> (Option<Bytes>, hyper::Body) {
-        match self.inner {
-            Inner::Reusable(chunk) => (Some(chunk.clone()), chunk.into()),
-            Inner::Hyper { body, timeout } => {
-                debug_assert!(timeout.is_none());
-                (None, body)
-            }
-        }
+    pub(crate) fn try_reuse(self) -> (Option<Bytes>, Self) {
+        let reuse = match self.inner {
+            Inner::Reusable(ref chunk) => Some(chunk.clone()),
+            Inner::Streaming { .. } => None,
+        };
+
+        (reuse, self)
     }
 
     pub(crate) fn into_stream(self) -> ImplStream {
@@ -95,7 +117,7 @@ impl Body {
     pub(crate) fn content_length(&self) -> Option<u64> {
         match self.inner {
             Inner::Reusable(ref bytes) => Some(bytes.len() as u64),
-            Inner::Hyper { ref body, .. } => body.size_hint().exact(),
+            Inner::Streaming { ref body, .. } => body.size_hint().exact(),
         }
     }
 }
@@ -143,13 +165,71 @@ impl fmt::Debug for Body {
 
 // ===== impl ImplStream =====
 
+impl HttpBody for ImplStream {
+    type Data = hyper::Chunk;
+    type Error = crate::Error;
+
+    fn poll_data(
+        mut self: Pin<&mut Self>,
+        cx: &mut Context,
+    ) -> Poll<Option<Result<Self::Data, Self::Error>>> {
+        let opt_try_chunk = match self.0.inner {
+            Inner::Streaming {
+                ref mut body,
+                ref mut timeout,
+            } => {
+                if let Some(ref mut timeout) = timeout {
+                    if let Poll::Ready(()) = Pin::new(timeout).poll(cx) {
+                        return Poll::Ready(Some(Err(crate::error::body(crate::error::TimedOut))));
+                    }
+                }
+                futures_core::ready!(Pin::new(body).poll_data(cx))
+                    .map(|opt_chunk| opt_chunk.map(Into::into).map_err(crate::error::body))
+            }
+            Inner::Reusable(ref mut bytes) => {
+                if bytes.is_empty() {
+                    None
+                } else {
+                    Some(Ok(std::mem::replace(bytes, Bytes::new()).into()))
+                }
+            }
+        };
+
+        Poll::Ready(opt_try_chunk)
+    }
+
+    fn poll_trailers(
+        self: Pin<&mut Self>,
+        _cx: &mut Context,
+    ) -> Poll<Result<Option<http::HeaderMap>, Self::Error>> {
+        Poll::Ready(Ok(None))
+    }
+
+    fn is_end_stream(&self) -> bool {
+        match self.0.inner {
+            Inner::Streaming { ref body, .. } => body.is_end_stream(),
+            Inner::Reusable(ref bytes) => bytes.is_empty(),
+        }
+    }
+
+    fn size_hint(&self) -> http_body::SizeHint {
+        match self.0.inner {
+            Inner::Streaming { ref body, .. } => body.size_hint(),
+            Inner::Reusable(ref bytes) => {
+                let mut hint = http_body::SizeHint::default();
+                hint.set_exact(bytes.len() as u64);
+                hint
+            }
+        }
+    }
+}
+
 impl Stream for ImplStream {
     type Item = Result<Bytes, crate::Error>;
 
-    #[inline]
     fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context) -> Poll<Option<Self::Item>> {
         let opt_try_chunk = match self.0.inner {
-            Inner::Hyper {
+            Inner::Streaming {
                 ref mut body,
                 ref mut timeout,
             } => {
@@ -173,3 +253,67 @@ impl Stream for ImplStream {
         Poll::Ready(opt_try_chunk)
     }
 }
+
+// ===== impl WrapStream =====
+
+impl<S, D, E> HttpBody for WrapStream<S>
+where
+    S: Stream<Item = Result<D, E>>,
+    D: Into<hyper::Chunk>,
+    E: Into<Box<dyn std::error::Error + Send + Sync>>,
+{
+    type Data = hyper::Chunk;
+    type Error = E;
+
+    fn poll_data(
+        self: Pin<&mut Self>,
+        cx: &mut Context,
+    ) -> Poll<Option<Result<Self::Data, Self::Error>>> {
+        // safe pin projection
+        let item =
+            futures_core::ready!(
+                unsafe { Pin::new_unchecked(&mut self.get_unchecked_mut().0) }.poll_next(cx)?
+            );
+
+        Poll::Ready(item.map(|val| Ok(val.into())))
+    }
+
+    fn poll_trailers(
+        self: Pin<&mut Self>,
+        _cx: &mut Context,
+    ) -> Poll<Result<Option<http::HeaderMap>, Self::Error>> {
+        Poll::Ready(Ok(None))
+    }
+}
+
+// ===== impl WrapHyper =====
+
+impl HttpBody for WrapHyper {
+    type Data = hyper::Chunk;
+    type Error = Box<dyn std::error::Error + Send + Sync>;
+
+    fn poll_data(
+        mut self: Pin<&mut Self>,
+        cx: &mut Context,
+    ) -> Poll<Option<Result<Self::Data, Self::Error>>> {
+        // safe pin projection
+        Pin::new(&mut self.0)
+            .poll_data(cx)
+            .map(|opt| opt.map(|res| res.map_err(Into::into)))
+    }
+
+    fn poll_trailers(
+        self: Pin<&mut Self>,
+        _cx: &mut Context,
+    ) -> Poll<Result<Option<http::HeaderMap>, Self::Error>> {
+        Poll::Ready(Ok(None))
+    }
+
+    fn is_end_stream(&self) -> bool {
+        self.0.is_end_stream()
+    }
+
+    fn size_hint(&self) -> http_body::SizeHint {
+        self.0.size_hint()
+    }
+}
diff --git a/src/async_impl/client.rs b/src/async_impl/client.rs
index 93590af..629d9ae 100644
--- a/src/async_impl/client.rs
+++ b/src/async_impl/client.rs
@@ -5,11 +5,11 @@ use std::sync::RwLock;
 use std::time::Duration;
 use std::{fmt, str};
 
-use crate::header::{
+use bytes::Bytes;
+use http::header::{
     Entry, HeaderMap, HeaderValue, ACCEPT, ACCEPT_ENCODING, CONTENT_ENCODING, CONTENT_LENGTH,
     CONTENT_TYPE, LOCATION, PROXY_AUTHORIZATION, RANGE, REFERER, TRANSFER_ENCODING, USER_AGENT,
 };
-use bytes::Bytes;
 use http::Uri;
 use hyper::client::ResponseFuture;
 use mime;
@@ -24,6 +24,7 @@ use log::debug;
 
 use super::request::{Request, RequestBuilder};
 use super::response::Response;
+use super::Body;
 use crate::connect::Connector;
 #[cfg(feature = "cookies")]
 use crate::cookie;
@@ -472,7 +473,7 @@ impl ClientBuilder {
     }
 }
 
-type HyperClient = hyper::Client<Connector>;
+type HyperClient = hyper::Client<Connector, super::body::ImplStream>;
 
 impl Client {
     /// Constructs a new `Client`.
@@ -612,10 +613,10 @@ impl Client {
 
         let (reusable, body) = match body {
             Some(body) => {
-                let (reusable, body) = body.into_hyper();
+                let (reusable, body) = body.try_reuse();
                 (Some(reusable), body)
             }
-            None => (None, hyper::Body::empty()),
+            None => (None, Body::empty()),
         };
 
         self.proxy_auth(&uri, &mut headers);
@@ -623,7 +624,7 @@ impl Client {
         let mut req = hyper::Request::builder()
             .method(method.clone())
             .uri(uri.clone())
-            .body(body)
+            .body(body.into_stream())
             .expect("valid request parts");
 
         *req.headers_mut() = headers.clone();
@@ -884,13 +885,13 @@ impl Future for PendingRequest {
                             debug!("redirecting to {:?} '{}'", self.method, self.url);
                             let uri = expect_uri(&self.url);
                             let body = match self.body {
-                                Some(Some(ref body)) => hyper::Body::from(body.clone()),
-                                _ => hyper::Body::empty(),
+                                Some(Some(ref body)) => Body::reusable(body.clone()),
+                                _ => Body::empty(),
                             };
                             let mut req = hyper::Request::builder()
                                 .method(self.method.clone())
                                 .uri(uri.clone())
-                                .body(body)
+                                .body(body.into_stream())
                                 .expect("valid request parts");
 
                             // Add cookies from the cookie store.
diff --git a/src/async_impl/multipart.rs b/src/async_impl/multipart.rs
index 0287f26..78d08cd 100644
--- a/src/async_impl/multipart.rs
+++ b/src/async_impl/multipart.rs
@@ -1,13 +1,16 @@
 //! multipart/form-data
 use std::borrow::Cow;
 use std::fmt;
+use std::pin::Pin;
 
+use bytes::Bytes;
 use http::HeaderMap;
 use mime_guess::Mime;
 use percent_encoding::{self, AsciiSet, NON_ALPHANUMERIC};
 use uuid::Uuid;
 
-use futures_util::StreamExt;
+use futures_core::Stream;
+use futures_util::{future, stream, StreamExt};
 
 use super::Body;
 
@@ -96,50 +99,58 @@ impl Form {
         self.with_inner(|inner| inner.percent_encode_noop())
     }
 
-    /// Consume this instance and transform into an instance of hyper::Body for use in a request.
-    pub(crate) fn stream(mut self) -> hyper::Body {
+    /// Consume this instance and transform into an instance of Body for use in a request.
+    pub(crate) fn stream(mut self) -> Body {
         if self.inner.fields.is_empty() {
-            return hyper::Body::empty();
+            return Body::empty();
         }
 
         // create initial part to init reduce chain
         let (name, part) = self.inner.fields.remove(0);
-        let start = self.part_stream(name, part);
+        let start = Box::pin(self.part_stream(name, part))
+            as Pin<Box<dyn Stream<Item = crate::Result<Bytes>> + Send + Sync>>;
 
         let fields = self.inner.take_fields();
         // for each field, chain an additional stream
         let stream = fields.into_iter().fold(start, |memo, (name, part)| {
             let part_stream = self.part_stream(name, part);
-            hyper::Body::wrap_stream(memo.chain(part_stream))
+            Box::pin(memo.chain(part_stream))
+                as Pin<Box<dyn Stream<Item = crate::Result<Bytes>> + Send + Sync>>
         });
         // append special ending boundary
-        let last = hyper::Body::from(format!("--{}--\r\n", self.boundary()));
-        hyper::Body::wrap_stream(stream.chain(last))
+        let last = stream::once(future::ready(Ok(
+            format!("--{}--\r\n", self.boundary()).into()
+        )));
+        Body::wrap_stream(stream.chain(last))
     }
 
     /// Generate a hyper::Body stream for a single Part instance of a Form request.
-    pub(crate) fn part_stream<T>(&mut self, name: T, part: Part) -> hyper::Body
+    pub(crate) fn part_stream<T>(
+        &mut self,
+        name: T,
+        part: Part,
+    ) -> impl Stream<Item = Result<Bytes, crate::Error>>
     where
         T: Into<Cow<'static, str>>,
     {
         // start with boundary
-        let boundary = hyper::Body::from(format!("--{}\r\n", self.boundary()));
+        let boundary = stream::once(future::ready(Ok(
+            format!("--{}\r\n", self.boundary()).into()
+        )));
         // append headers
-        let header = hyper::Body::from({
+        let header = stream::once(future::ready(Ok({
             let mut h = self
                 .inner
                 .percent_encoding
                 .encode_headers(&name.into(), &part.meta);
             h.extend_from_slice(b"\r\n\r\n");
-            h
-        });
+            h.into()
+        })));
         // then append form data followed by terminating CRLF
-        hyper::Body::wrap_stream(
-            boundary
-                .chain(header)
-                .chain(hyper::Body::wrap_stream(part.value.into_stream()))
-                .chain(hyper::Body::from("\r\n".to_owned())),
-        )
+        boundary
+            .chain(header)
+            .chain(part.value.into_stream())
+            .chain(stream::once(future::ready(Ok("\r\n".into()))))
     }
 
     pub(crate) fn compute_length(&mut self) -> Option<u64> {
@@ -482,8 +493,8 @@ mod tests {
         let form = Form::new();
 
         let mut rt = tokio::runtime::current_thread::Runtime::new().expect("new rt");
-        let body = form.stream();
-        let s = body.map(|try_c| try_c.map(|c| c.into_bytes())).try_concat();
+        let body = form.stream().into_stream();
+        let s = body.map(|try_c| try_c.map(Bytes::from)).try_concat();
 
         let out = rt.block_on(s);
         assert_eq!(out.unwrap(), Vec::new());
@@ -530,8 +541,8 @@ mod tests {
              Content-Disposition: form-data; name=\"key3\"; filename=\"filename\"\r\n\r\n\
              value3\r\n--boundary--\r\n";
         let mut rt = tokio::runtime::current_thread::Runtime::new().expect("new rt");
-        let body = form.stream();
-        let s = body.map(|try_c| try_c.map(|c| c.into_bytes())).try_concat();
+        let body = form.stream().into_stream();
+        let s = body.map(|try_c| try_c.map(Bytes::from)).try_concat();
 
         let out = rt.block_on(s).unwrap();
         // These prints are for debug purposes in case the test fails
@@ -557,8 +568,8 @@ mod tests {
                         value2\r\n\
                         --boundary--\r\n";
         let mut rt = tokio::runtime::current_thread::Runtime::new().expect("new rt");
-        let body = form.stream();
-        let s = body.map(|try_c| try_c.map(|c| c.into_bytes())).try_concat();
+        let body = form.stream().into_stream();
+        let s = body.map(|try_c| try_c.map(Bytes::from)).try_concat();
 
         let out = rt.block_on(s).unwrap();
         // These prints are for debug purposes in case the test fails
diff --git a/src/async_impl/request.rs b/src/async_impl/request.rs
index 53be49b..b8366e4 100644
--- a/src/async_impl/request.rs
+++ b/src/async_impl/request.rs
@@ -219,7 +219,7 @@ impl RequestBuilder {
         };
 
         if let Ok(ref mut req) = builder.request {
-            *req.body_mut() = Some(Body::wrap(multipart.stream()))
+            *req.body_mut() = Some(multipart.stream())
         }
         builder
     }
diff --git a/tests/redirect.rs b/tests/redirect.rs
index f863fd4..e0c3818 100644
--- a/tests/redirect.rs
+++ b/tests/redirect.rs
@@ -80,12 +80,14 @@ async fn test_redirect_307_and_308_tries_to_get_again() {
 
 #[tokio::test]
 async fn test_redirect_307_and_308_tries_to_post_again() {
+    let _ = env_logger::try_init();
     let client = reqwest::Client::new();
     let codes = [307u16, 308];
     for &code in codes.iter() {
         let redirect = server::http(move |mut req| {
             async move {
                 assert_eq!(req.method(), "POST");
+                assert_eq!(req.headers()["content-length"], "5");
 
                 let data = req.body_mut().next().await.unwrap().unwrap();
                 assert_eq!(&*data, b"Hello");