diff --git a/examples/single_threaded.rs b/examples/single_threaded.rs
index 83b64ebf21..5466251116 100644
--- a/examples/single_threaded.rs
+++ b/examples/single_threaded.rs
@@ -52,7 +52,7 @@ impl HttpBody for Body {
 fn main() {
     pretty_env_logger::init();
 
-    let server = thread::spawn(move || {
+    let server_http2 = thread::spawn(move || {
         // Configure a runtime for the server that runs everything on the current thread
         let rt = tokio::runtime::Builder::new_current_thread()
             .enable_all()
@@ -61,10 +61,10 @@ fn main() {
 
         // Combine it with a `LocalSet,  which means it can spawn !Send futures...
         let local = tokio::task::LocalSet::new();
-        local.block_on(&rt, server()).unwrap();
+        local.block_on(&rt, http2_server()).unwrap();
     });
 
-    let client = thread::spawn(move || {
+    let client_http2 = thread::spawn(move || {
         // Configure a runtime for the client that runs everything on the current thread
         let rt = tokio::runtime::Builder::new_current_thread()
             .enable_all()
@@ -76,16 +76,137 @@ fn main() {
         local
             .block_on(
                 &rt,
-                client("http://localhost:3000".parse::<hyper::Uri>().unwrap()),
+                http2_client("http://localhost:3000".parse::<hyper::Uri>().unwrap()),
             )
             .unwrap();
     });
 
-    server.join().unwrap();
-    client.join().unwrap();
+    let server_http1 = thread::spawn(move || {
+        // Configure a runtime for the server that runs everything on the current thread
+        let rt = tokio::runtime::Builder::new_current_thread()
+            .enable_all()
+            .build()
+            .expect("build runtime");
+
+        // Combine it with a `LocalSet,  which means it can spawn !Send futures...
+        let local = tokio::task::LocalSet::new();
+        local.block_on(&rt, http1_server()).unwrap();
+    });
+
+    let client_http1 = thread::spawn(move || {
+        // Configure a runtime for the client that runs everything on the current thread
+        let rt = tokio::runtime::Builder::new_current_thread()
+            .enable_all()
+            .build()
+            .expect("build runtime");
+
+        // Combine it with a `LocalSet,  which means it can spawn !Send futures...
+        let local = tokio::task::LocalSet::new();
+        local
+            .block_on(
+                &rt,
+                http1_client("http://localhost:3001".parse::<hyper::Uri>().unwrap()),
+            )
+            .unwrap();
+    });
+
+    server_http2.join().unwrap();
+    client_http2.join().unwrap();
+
+    server_http1.join().unwrap();
+    client_http1.join().unwrap();
+}
+
+async fn http1_server() -> Result<(), Box<dyn std::error::Error>> {
+    let addr = SocketAddr::from(([127, 0, 0, 1], 3001));
+
+    let listener = TcpListener::bind(addr).await?;
+
+    // For each connection, clone the counter to use in our service...
+    let counter = Rc::new(Cell::new(0));
+
+    loop {
+        let (stream, _) = listener.accept().await?;
+
+        let io = TokioIo::new(stream);
+
+        let cnt = counter.clone();
+
+        let service = service_fn(move |_| {
+            let prev = cnt.get();
+            cnt.set(prev + 1);
+            let value = cnt.get();
+            async move { Ok::<_, Error>(Response::new(Body::from(format!("Request #{}", value)))) }
+        });
+
+        tokio::task::spawn_local(async move {
+            if let Err(err) = hyper::server::conn::http1::Builder::new()
+                .serve_connection(io, service)
+                .await
+            {
+                println!("Error serving connection: {:?}", err);
+            }
+        });
+    }
+}
+
+async fn http1_client(url: hyper::Uri) -> Result<(), Box<dyn std::error::Error>> {
+    let host = url.host().expect("uri has no host");
+    let port = url.port_u16().unwrap_or(80);
+    let addr = format!("{}:{}", host, port);
+    let stream = TcpStream::connect(addr).await?;
+
+    let io = TokioIo::new(stream);
+
+    let (mut sender, conn) = hyper::client::conn::http1::handshake(io).await?;
+
+    tokio::task::spawn_local(async move {
+        if let Err(err) = conn.await {
+            let mut stdout = io::stdout();
+            stdout
+                .write_all(format!("Connection failed: {:?}", err).as_bytes())
+                .await
+                .unwrap();
+            stdout.flush().await.unwrap();
+        }
+    });
+
+    let authority = url.authority().unwrap().clone();
+
+    // Make 4 requests
+    for _ in 0..4 {
+        let req = Request::builder()
+            .uri(url.clone())
+            .header(hyper::header::HOST, authority.as_str())
+            .body(Body::from("test".to_string()))?;
+
+        let mut res = sender.send_request(req).await?;
+
+        let mut stdout = io::stdout();
+        stdout
+            .write_all(format!("Response: {}\n", res.status()).as_bytes())
+            .await
+            .unwrap();
+        stdout
+            .write_all(format!("Headers: {:#?}\n", res.headers()).as_bytes())
+            .await
+            .unwrap();
+        stdout.flush().await.unwrap();
+
+        // Print the response body
+        while let Some(next) = res.frame().await {
+            let frame = next?;
+            if let Some(chunk) = frame.data_ref() {
+                stdout.write_all(&chunk).await.unwrap();
+            }
+        }
+        stdout.write_all(b"\n-----------------\n").await.unwrap();
+        stdout.flush().await.unwrap();
+    }
+    Ok(())
 }
 
-async fn server() -> Result<(), Box<dyn std::error::Error>> {
+async fn http2_server() -> Result<(), Box<dyn std::error::Error>> {
     let mut stdout = io::stdout();
 
     let addr: SocketAddr = ([127, 0, 0, 1], 3000).into();
@@ -102,7 +223,7 @@ async fn server() -> Result<(), Box<dyn std::error::Error>> {
 
     loop {
         let (stream, _) = listener.accept().await?;
-        let io = TokioIo::new(stream);
+        let io = IOTypeNotSend::new(TokioIo::new(stream));
 
         // For each connection, clone the counter to use in our service...
         let cnt = counter.clone();
@@ -130,55 +251,7 @@ async fn server() -> Result<(), Box<dyn std::error::Error>> {
     }
 }
 
-struct IOTypeNotSend {
-    _marker: PhantomData<*const ()>,
-    stream: TokioIo<TcpStream>,
-}
-
-impl IOTypeNotSend {
-    fn new(stream: TokioIo<TcpStream>) -> Self {
-        Self {
-            _marker: PhantomData,
-            stream,
-        }
-    }
-}
-
-impl hyper::rt::Write for IOTypeNotSend {
-    fn poll_write(
-        mut self: Pin<&mut Self>,
-        cx: &mut Context<'_>,
-        buf: &[u8],
-    ) -> Poll<Result<usize, std::io::Error>> {
-        Pin::new(&mut self.stream).poll_write(cx, buf)
-    }
-
-    fn poll_flush(
-        mut self: Pin<&mut Self>,
-        cx: &mut Context<'_>,
-    ) -> Poll<Result<(), std::io::Error>> {
-        Pin::new(&mut self.stream).poll_flush(cx)
-    }
-
-    fn poll_shutdown(
-        mut self: Pin<&mut Self>,
-        cx: &mut Context<'_>,
-    ) -> Poll<Result<(), std::io::Error>> {
-        Pin::new(&mut self.stream).poll_shutdown(cx)
-    }
-}
-
-impl hyper::rt::Read for IOTypeNotSend {
-    fn poll_read(
-        mut self: Pin<&mut Self>,
-        cx: &mut Context<'_>,
-        buf: hyper::rt::ReadBufCursor<'_>,
-    ) -> Poll<std::io::Result<()>> {
-        Pin::new(&mut self.stream).poll_read(cx, buf)
-    }
-}
-
-async fn client(url: hyper::Uri) -> Result<(), Box<dyn std::error::Error>> {
+async fn http2_client(url: hyper::Uri) -> Result<(), Box<dyn std::error::Error>> {
     let host = url.host().expect("uri has no host");
     let port = url.port_u16().unwrap_or(80);
     let addr = format!("{}:{}", host, port);
@@ -250,3 +323,51 @@ where
         tokio::task::spawn_local(fut);
     }
 }
+
+struct IOTypeNotSend {
+    _marker: PhantomData<*const ()>,
+    stream: TokioIo<TcpStream>,
+}
+
+impl IOTypeNotSend {
+    fn new(stream: TokioIo<TcpStream>) -> Self {
+        Self {
+            _marker: PhantomData,
+            stream,
+        }
+    }
+}
+
+impl hyper::rt::Write for IOTypeNotSend {
+    fn poll_write(
+        mut self: Pin<&mut Self>,
+        cx: &mut Context<'_>,
+        buf: &[u8],
+    ) -> Poll<Result<usize, std::io::Error>> {
+        Pin::new(&mut self.stream).poll_write(cx, buf)
+    }
+
+    fn poll_flush(
+        mut self: Pin<&mut Self>,
+        cx: &mut Context<'_>,
+    ) -> Poll<Result<(), std::io::Error>> {
+        Pin::new(&mut self.stream).poll_flush(cx)
+    }
+
+    fn poll_shutdown(
+        mut self: Pin<&mut Self>,
+        cx: &mut Context<'_>,
+    ) -> Poll<Result<(), std::io::Error>> {
+        Pin::new(&mut self.stream).poll_shutdown(cx)
+    }
+}
+
+impl hyper::rt::Read for IOTypeNotSend {
+    fn poll_read(
+        mut self: Pin<&mut Self>,
+        cx: &mut Context<'_>,
+        buf: hyper::rt::ReadBufCursor<'_>,
+    ) -> Poll<std::io::Result<()>> {
+        Pin::new(&mut self.stream).poll_read(cx, buf)
+    }
+}
diff --git a/src/client/conn/http1.rs b/src/client/conn/http1.rs
index a66b42b5b5..2034f0f2a6 100644
--- a/src/client/conn/http1.rs
+++ b/src/client/conn/http1.rs
@@ -249,7 +249,7 @@ where
 impl<T, B> Future for Connection<T, B>
 where
     T: Read + Write + Unpin + Send + 'static,
-    B: Body + Send + 'static,
+    B: Body + 'static,
     B::Data: Send,
     B::Error: Into<Box<dyn StdError + Send + Sync>>,
 {
diff --git a/src/client/conn/http2.rs b/src/client/conn/http2.rs
index c6106d15df..0c135c2bc6 100644
--- a/src/client/conn/http2.rs
+++ b/src/client/conn/http2.rs
@@ -194,7 +194,7 @@ impl<B> fmt::Debug for SendRequest<B> {
 impl<T, B, E> Connection<T, B, E>
 where
     T: Read + Write + Unpin + 'static,
-    B: Body + Unpin + Send + 'static,
+    B: Body + Unpin + 'static,
     B::Data: Send,
     B::Error: Into<Box<dyn Error + Send + Sync>>,
     E: ExecutorClient<B, T> + Unpin,