diff --git a/Cargo.lock b/Cargo.lock
index 47ff9585dd7..e24486480dd 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1868,7 +1868,7 @@ dependencies = [
  "profile_traits 0.0.1",
  "serde 1.0.27 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_json 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "servo-websocket 0.20.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "servo-websocket 0.21.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "servo_config 0.0.1",
  "servo_url 0.0.1",
  "threadpool 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2742,16 +2742,15 @@ dependencies = [
 
 [[package]]
 name = "servo-websocket"
-version = "0.20.0"
+version = "0.21.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
+ "base64 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "bitflags 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "byteorder 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "hyper 0.10.13 (registry+https://github.com/rust-lang/crates.io-index)",
- "net2 0.2.29 (registry+https://github.com/rust-lang/crates.io-index)",
- "openssl 0.9.22 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc-serialize 0.3.24 (registry+https://github.com/rust-lang/crates.io-index)",
+ "sha1 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "unicase 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "url 1.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -3915,7 +3914,7 @@ dependencies = [
 "checksum servo-fontconfig-sys 4.0.4 (registry+https://github.com/rust-lang/crates.io-index)" = "38b494f03009ee81914b0e7d387ad7c145cafcd69747c2ec89b0e17bb94f303a"
 "checksum servo-freetype-sys 4.0.3 (registry+https://github.com/rust-lang/crates.io-index)" = "9232032c2e85118c0282c6562c84cab12316e655491ba0a5d1905b2320060d1b"
 "checksum servo-skia 0.30000013.1 (registry+https://github.com/rust-lang/crates.io-index)" = "3fb707c7dc3d8a053b8c9d48ed9eb7f2a0c0751616dfbe3598f526948408bc33"
-"checksum servo-websocket 0.20.0 (registry+https://github.com/rust-lang/crates.io-index)" = "efde78dfcf2178d5a11e1e2268e0d8df0627dfe2724546db8585d6678e1af150"
+"checksum servo-websocket 0.21.0 (registry+https://github.com/rust-lang/crates.io-index)" = "6bac1e2295e72f0525147d993c626761811acf0441dac1cee8707f12dc7f3363"
 "checksum sha1 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "cc30b1e1e8c40c121ca33b86c23308a090d19974ef001b4bf6e61fd1a0fb095c"
 "checksum shared_library 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "fb04126b6fcfd2710fb5b6d18f4207b6c535f2850a7e1a43bcd526d44f30a79a"
 "checksum sig 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "c6649e43c1a1e68d29ed56d0dc3b5b6cf3b901da77cf107c4066b9e3da036df5"
diff --git a/components/net/Cargo.toml b/components/net/Cargo.toml
index 27807663744..b9f24ebac34 100644
--- a/components/net/Cargo.toml
+++ b/components/net/Cargo.toml
@@ -35,7 +35,7 @@ serde = "1.0"
 serde_json = "1.0"
 servo_config = {path = "../config"}
 servo_url = {path = "../url"}
-servo-websocket = "0.20"
+servo-websocket = { version = "0.21", default-features = false, features = ["sync"] }
 threadpool = "1.0"
 time = "0.1.17"
 unicase = "1.4.0"
diff --git a/components/net/websocket_loader.rs b/components/net/websocket_loader.rs
index d369300ecd2..77140631e7a 100644
--- a/components/net/websocket_loader.rs
+++ b/components/net/websocket_loader.rs
@@ -26,11 +26,12 @@ use std::sync::{Arc, Mutex};
 use std::sync::atomic::{AtomicBool, Ordering};
 use std::thread;
 use url::Position;
-use websocket::{Message, Receiver as WSReceiver, Sender as WSSender};
+use websocket::Message;
 use websocket::header::{Origin, WebSocketAccept, WebSocketKey, WebSocketProtocol, WebSocketVersion};
-use websocket::message::Type as MessageType;
-use websocket::receiver::Receiver;
-use websocket::sender::Sender;
+use websocket::message::OwnedMessage;
+use websocket::receiver::{Reader as WsReader, Receiver as WsReceiver};
+use websocket::sender::{Sender as WsSender, Writer as WsWriter};
+use websocket::ws::dataframe::DataFrame;
 
 pub fn init(
     req_init: RequestInit,
@@ -60,7 +61,7 @@ pub fn init(
         let ws_sender_incoming = ws_sender.clone();
         thread::spawn(move || {
             for message in receiver.incoming_messages() {
-                let message: Message = match message {
+                let message = match message {
                     Ok(m) => m,
                     Err(e) => {
                         debug!("Error receiving incoming WebSocket message: {:?}", e);
@@ -68,21 +69,25 @@ pub fn init(
                         break;
                     }
                 };
-                let message = match message.opcode {
-                    MessageType::Text => MessageData::Text(String::from_utf8_lossy(&message.payload).into_owned()),
-                    MessageType::Binary => MessageData::Binary(message.payload.into_owned()),
-                    MessageType::Ping => {
-                        let pong = Message::pong(message.payload);
+                let message = match message {
+                    OwnedMessage::Text(_) => {
+                        MessageData::Text(String::from_utf8_lossy(&message.take_payload()).into_owned())
+                    },
+                    OwnedMessage::Binary(_) => MessageData::Binary(message.take_payload()),
+                    OwnedMessage::Ping(_) => {
+                        let pong = Message::pong(message.take_payload());
                         ws_sender_incoming.lock().unwrap().send_message(&pong).unwrap();
                         continue;
                     },
-                    MessageType::Pong => continue,
-                    MessageType::Close => {
+                    OwnedMessage::Pong(_) => continue,
+                    OwnedMessage::Close(ref msg) => {
                         if !initiated_close_incoming.fetch_or(true, Ordering::SeqCst) {
                             ws_sender_incoming.lock().unwrap().send_message(&message).unwrap();
                         }
-                        let code = message.cd_status_code;
-                        let reason = String::from_utf8_lossy(&message.payload).into_owned();
+                        let (code, reason) = match *msg {
+                            None => (None, "".into()),
+                            Some(ref data) => (Some(data.status_code), data.reason.clone())
+                        };
                         let _ = resource_event_sender.send(WebSocketNetworkEvent::Close(code, reason));
                         break;
                     },
@@ -148,7 +153,7 @@ fn obtain_a_websocket_connection(url: &ServoUrl) -> Result<Stream, NetworkError>
 fn establish_a_websocket_connection(
     req_init: RequestInit,
     http_state: &HttpState
-) -> Result<(Option<String>, Sender<Stream>, Receiver<Stream>), NetworkError>
+) -> Result<(Option<String>, WsWriter<HttpStream>, WsReader<HttpStream>), NetworkError>
 {
     let protocols = match req_init.mode {
         RequestMode::WebSocket { protocols } => protocols.clone(),
@@ -255,9 +260,19 @@ fn establish_a_websocket_connection(
         None
     };
 
-    let sender = Sender::new(response.writer, true);
-    let receiver = Receiver::new(response.reader, false);
-    Ok((protocol_in_use, sender, receiver))
+    let sender = WsSender::new(true);
+    let writer = WsWriter {
+        stream: response.writer,
+        sender
+    };
+
+    let receiver = WsReceiver::new(false);
+    let reader = WsReader {
+        stream: response.reader,
+        receiver,
+    };
+
+    Ok((protocol_in_use, writer, reader))
 }
 
 struct Response {