diff --git a/lib/WebSocketTransport.js b/lib/WebSocketTransport.js
index aba60bab6c9..492beb62661 100644
--- a/lib/WebSocketTransport.js
+++ b/lib/WebSocketTransport.js
@@ -25,9 +25,9 @@ class WebSocketTransport {
    */
   static create(url) {
     return new Promise((resolve, reject) => {
-      const ws = new WebSocket(url, { perMessageDeflate: false });
-      ws.on('open', () => resolve(new WebSocketTransport(ws)));
-      ws.on('error', reject);
+      const ws = new WebSocket(url, [], { perMessageDeflate: false });
+      ws.addEventListener('open', () => resolve(new WebSocketTransport(ws)));
+      ws.addEventListener('error', reject);
     });
   }
 
@@ -36,16 +36,16 @@ class WebSocketTransport {
    */
   constructor(ws) {
     this._ws = ws;
-    this._ws.on('message', event => {
+    this._ws.addEventListener('message', event => {
       if (this.onmessage)
-        this.onmessage.call(null, event);
+        this.onmessage.call(null, event.data);
     });
-    this._ws.on('close', event => {
+    this._ws.addEventListener('close', event => {
       if (this.onclose)
         this.onclose.call(null);
     });
     // Silently ignore all errors - we don't know what to do with them.
-    this._ws.on('error', () => {});
+    this._ws.addEventListener('error', () => {});
     this.onmessage = null;
     this.onclose = null;
   }