diff --git a/vendor/websocket.js b/vendor/websocket.js
index 406023c0f..b8c3b92f5 100644
--- a/vendor/websocket.js
+++ b/vendor/websocket.js
@@ -38,7 +38,7 @@ var http = require('http');
 var https = require('https');
 var net = require('net');
 var urllib = require('url');
-var sys = require('sys');
+var util = require('util');
 
 var FRAME_NO = 0;
 var FRAME_LO = 1;
@@ -52,7 +52,7 @@ var CLOSED = 3;
 
 var debugLevel = parseInt(process.env.NODE_DEBUG, 16);
 var debug = (debugLevel & 0x4) ?
-    function() { sys.error.apply(this, arguments); } :
+    function() { util.error.apply(this, arguments); } :
     function() { };
 
 // Generate a Sec-WebSocket-* value
@@ -246,7 +246,7 @@ var WebSocket = function(url, proto, opts) {
 
         // FRAME_LO
         function(buf, off) {
-            debug('frame_lo(' + sys.inspect(buf) + ', ' + off + ')');
+            debug('frame_lo(' + util.inspect(buf) + ', ' + off + ')');
 
             // Find the first instance of 0xff, our terminating byte
             for (var i = off; i < buf.length && buf[i] != 0xff; i++)
@@ -306,7 +306,7 @@ var WebSocket = function(url, proto, opts) {
 
         // FRAME_HI
         function(buf, off) {
-            debug('frame_hi(' + sys.inspect(buf) + ', ' + off + ')');
+            debug('frame_hi(' + util.inspect(buf) + ', ' + off + ')');
 
             if (buf[off] !== 0) {
                 throw new Error('High-byte framing not supported.');
@@ -323,7 +323,7 @@ var WebSocket = function(url, proto, opts) {
             return;
         }
 
-        debug('dataListener(' + sys.inspect(buf) + ')');
+        debug('dataListener(' + util.inspect(buf) + ')');
 
         var off = 0;
         var consumed = 0;
@@ -624,7 +624,7 @@ var WebSocket = function(url, proto, opts) {
         httpReq.end();
     })();
 };
-sys.inherits(WebSocket, events.EventEmitter);
+util.inherits(WebSocket, events.EventEmitter);
 exports.WebSocket = WebSocket;
 
 // Add some constants to the WebSocket object