diff --git a/src/connect.rs b/src/connect.rs
index dfb44de..2189eb4 100644
--- a/src/connect.rs
+++ b/src/connect.rs
@@ -67,7 +67,7 @@ mod encryption {
     }
 
     pub fn wrap_stream<S>(socket: S, domain: String, mode: Mode)
-        -> Box<Future<Item=AutoStream<S>, Error=Error> + Send>
+        -> Box<dyn Future<Item=AutoStream<S>, Error=Error> + Send>
     where
         S: 'static + AsyncRead + AsyncWrite + Send,
     {
@@ -77,8 +77,8 @@ mod encryption {
                 Box::new(future::result(TlsConnector::new())
                             .map(TokioTlsConnector::from)
                             .and_then(move |connector| connector.connect(&domain, socket))
-                            .map(|s| StreamSwitcher::Tls(s))
-                            .map_err(|e| Error::Tls(e)))
+                            .map(StreamSwitcher::Tls)
+                            .map_err(Error::Tls))
             }
         }
     }
@@ -123,7 +123,7 @@ fn domain(request: &Request) -> Result<String, Error> {
 /// Creates a WebSocket handshake from a request and a stream,
 /// upgrading the stream to TLS if required.
 pub fn client_async_tls<R, S>(request: R, stream: S)
-    -> Box<Future<Item=(WebSocketStream<AutoStream<S>>, Response), Error=Error> + Send>
+    -> Box<dyn Future<Item=(WebSocketStream<AutoStream<S>>, Response), Error=Error> + Send>
 where
     R: Into<Request<'static>>,
     S: 'static + AsyncRead + AsyncWrite + NoDelay + Send,
@@ -138,7 +138,7 @@ where
     // Make sure we check domain and mode first. URL must be valid.
     let mode = match url_mode(&request.url) {
         Ok(m) => m,
-        Err(e) => return Box::new(future::err(e.into())),
+        Err(e) => return Box::new(future::err(e)),
     };
 
     Box::new(wrap_stream(stream, domain, mode)
@@ -152,7 +152,7 @@ where
 
 /// Connect to a given URL.
 pub fn connect_async<R>(request: R)
-    -> Box<Future<Item=(WebSocketStream<AutoStream<TcpStream>>, Response), Error=Error> + Send>
+    -> Box<dyn Future<Item=(WebSocketStream<AutoStream<TcpStream>>, Response), Error=Error> + Send>
 where
     R: Into<Request<'static>>
 {
diff --git a/src/lib.rs b/src/lib.rs
index 52f1697..fb70c47 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -215,7 +215,7 @@ impl<T> Stream for WebSocketStream<T> where T: AsyncRead + AsyncWrite {
     fn poll(&mut self) -> Poll<Option<Message>, WsError> {
         self.inner
             .read_message()
-            .map(|msg| Some(msg))
+            .map(Some)
             .to_async()
             .or_else(|err| match err {
                 WsError::ConnectionClosed => Ok(Async::Ready(None)),