diff --git a/example/server.js b/example/server.js
index bfd81973b2..0796f9cf67 100644
--- a/example/server.js
+++ b/example/server.js
@@ -6,7 +6,7 @@ var http = require('http')
   , url = require('url')
   , fs = require('fs')
   , io = require('../')
-  , sys = require('sys')
+  , sys = require(process.binding('natives').util ? 'util' : 'sys'))
   , server;
     
 server = http.createServer(function(req, res){
@@ -60,4 +60,4 @@ io.on('connection', function(client){
   client.on('disconnect', function(){
     client.broadcast({ announcement: client.sessionId + ' disconnected' });
   });
-});
\ No newline at end of file
+});
diff --git a/lib/socket.io/client.js b/lib/socket.io/client.js
index e0a9d558fe..afebaf9a44 100644
--- a/lib/socket.io/client.js
+++ b/lib/socket.io/client.js
@@ -4,7 +4,8 @@ var urlparse = require('url').parse
   , options = require('./utils').options
   , encode = require('./utils').encode
   , decode = require('./utils').decode
-  , merge = require('./utils').merge;
+  , merge = require('./utils').merge
+  , util = require(process.binding('natives').util ? 'util' : 'sys');
 
 var Client = module.exports = function(listener, req, res, options, head){
   process.EventEmitter.call(this);
@@ -22,7 +23,7 @@ var Client = module.exports = function(listener, req, res, options, head){
   this._onConnect(req, res);
 };
 
-require('sys').inherits(Client, process.EventEmitter);
+util.inherits(Client, process.EventEmitter);
 
 Client.prototype.send = function(message){
   if (!this._open || !(this.connection.readyState === 'open' || this.connection.readyState === 'writeOnly')){
diff --git a/lib/socket.io/listener.js b/lib/socket.io/listener.js
index 2a40b9aa31..4d042d64c9 100644
--- a/lib/socket.io/listener.js
+++ b/lib/socket.io/listener.js
@@ -1,5 +1,5 @@
 var url = require('url')
-  , sys = require('sys')
+  , util = require(process.binding('natives').util ? 'util' : 'sys')
   , fs = require('fs')
   , options = require('./utils').options
   , Client = require('./client')
@@ -23,7 +23,7 @@ var Listener = module.exports = function(server, options){
     flashPolicyServer: true,
     transports: ['websocket', 'flashsocket', 'htmlfile', 'xhr-multipart', 'xhr-polling', 'jsonp-polling'],
     transportOptions: {},
-    log: sys.log
+    log: util.log
   }, options);
   
   if (!this.options.log) this.options.log = function(){};
@@ -55,7 +55,7 @@ var Listener = module.exports = function(server, options){
   this.options.log('socket.io ready - accepting connections');
 };
 
-sys.inherits(Listener, process.EventEmitter);
+util.inherits(Listener, process.EventEmitter);
 for (var i in options) Listener.prototype[i] = options[i];
 
 Listener.prototype.broadcast = function(message, except){
@@ -166,4 +166,4 @@ Listener.prototype._onClientDisconnect = function(client){
 Listener.prototype._onConnection = function(transport, req, res, httpUpgrade, head){
   this.options.log('Initializing client with transport "'+ transport +'"');
   new transports[transport](this, req, res, this.options.transportOptions[transport], head);
-};
\ No newline at end of file
+};
diff --git a/lib/socket.io/transports/flashsocket.js b/lib/socket.io/transports/flashsocket.js
index 75515ea6b4..4989354ef1 100644
--- a/lib/socket.io/transports/flashsocket.js
+++ b/lib/socket.io/transports/flashsocket.js
@@ -1,4 +1,5 @@
 var net = require('net')
+  , util = require(process.binding('natives').util ? 'util' : 'sys')
   , WebSocket = require('./websocket')
   , listeners = []
   , netserver;
@@ -7,7 +8,7 @@ var Flashsocket = module.exports = function(){
   WebSocket.apply(this, arguments);
 };
 
-require('sys').inherits(Flashsocket, WebSocket);
+util.inherits(Flashsocket, WebSocket);
 
 Flashsocket.httpUpgrade = true;
 
@@ -82,4 +83,4 @@ function policy(listeners) {
 
   xml += '</cross-domain-policy>\n';
   return xml;
-};
\ No newline at end of file
+};
diff --git a/lib/socket.io/transports/htmlfile.js b/lib/socket.io/transports/htmlfile.js
index 9812c101b7..9c4b91d1e3 100644
--- a/lib/socket.io/transports/htmlfile.js
+++ b/lib/socket.io/transports/htmlfile.js
@@ -1,11 +1,12 @@
 var Client = require('../client')
+  , util = require(process.binding('natives').util ? 'util' : 'sys')
   , qs = require('querystring');
 
 var HTMLFile = module.exports = function(){
   Client.apply(this, arguments);
 };
 
-require('sys').inherits(HTMLFile, Client);
+util.inherits(HTMLFile, Client);
   
 HTMLFile.prototype._onConnect = function(req, res){
   var self = this, body = '';
@@ -43,4 +44,4 @@ HTMLFile.prototype._onConnect = function(req, res){
 HTMLFile.prototype._write = function(message){
   if (this._open)
     this.response.write('<script>parent.s._('+ JSON.stringify(message) +', document);</script>'); //json for escaping
-};
\ No newline at end of file
+};
diff --git a/lib/socket.io/transports/jsonp-polling.js b/lib/socket.io/transports/jsonp-polling.js
index 502a9613a0..82ff6349c7 100644
--- a/lib/socket.io/transports/jsonp-polling.js
+++ b/lib/socket.io/transports/jsonp-polling.js
@@ -1,10 +1,11 @@
-var XHRPolling = require('./xhr-polling');
+var XHRPolling = require('./xhr-polling')
+  , util = require(process.binding('natives').util ? 'util' : 'sys');
 
 JSONPPolling = module.exports = function(){
   XHRPolling.apply(this, arguments);
 };
 
-require('sys').inherits(JSONPPolling, XHRPolling);
+util.inherits(JSONPPolling, XHRPolling);
   
 JSONPPolling.prototype.getOptions = function(){
   return {
@@ -31,4 +32,4 @@ JSONPPolling.prototype._write = function(message){
     this.response.end();
     this._onClose();
   }
-};
\ No newline at end of file
+};
diff --git a/lib/socket.io/transports/websocket.js b/lib/socket.io/transports/websocket.js
index d3798444c2..b950d15803 100644
--- a/lib/socket.io/transports/websocket.js
+++ b/lib/socket.io/transports/websocket.js
@@ -1,13 +1,14 @@
 var Client = require('../client')
   , Stream = require('net').Stream
   , url = require('url')
+  , util = require(process.binding('natives').util ? 'util' : 'sys')
   , crypto = require('crypto');
 
 WebSocket = module.exports = function(){
   Client.apply(this, arguments);
 };
 
-require('sys').inherits(WebSocket, Client);
+util.inherits(WebSocket, Client);
 
 WebSocket.prototype._onConnect = function(req, socket){
   var self = this
@@ -133,4 +134,4 @@ WebSocket.prototype._write = function(message){
   }
 };
 
-WebSocket.httpUpgrade = true;
\ No newline at end of file
+WebSocket.httpUpgrade = true;
diff --git a/lib/socket.io/transports/xhr-multipart.js b/lib/socket.io/transports/xhr-multipart.js
index 1c2e9c7253..e080ea3d7f 100644
--- a/lib/socket.io/transports/xhr-multipart.js
+++ b/lib/socket.io/transports/xhr-multipart.js
@@ -1,11 +1,12 @@
 var Client = require('../client')
+  , util = require(process.binding('natives').util ? 'util' : 'sys')
   , qs = require('querystring');
 
 var Multipart = module.exports = function(){
   Client.apply(this, arguments);
 };
 
-require('sys').inherits(Multipart, Client);
+util.inherits(Multipart, Client);
 
 Multipart.prototype._onConnect = function(req, res){
   var self = this, body = '', headers = {};
@@ -61,4 +62,4 @@ Multipart.prototype._write = function(message){
     this.response.write(message + "\n");
     this.response.write("--socketio\n");
   }
-};
\ No newline at end of file
+};
diff --git a/lib/socket.io/transports/xhr-polling.js b/lib/socket.io/transports/xhr-polling.js
index e85392c5b4..23b121e7e8 100644
--- a/lib/socket.io/transports/xhr-polling.js
+++ b/lib/socket.io/transports/xhr-polling.js
@@ -1,11 +1,12 @@
 var Client = require('../client')
+  , util = require(process.binding('natives').util ? 'util' : 'sys')
   , qs = require('querystring');
 
 var Polling = module.exports = function(){
   Client.apply(this, arguments);
 };
 
-require('sys').inherits(Polling, Client);
+util.inherits(Polling, Client);
 
 Polling.prototype.getOptions = function(){
   return {
@@ -75,4 +76,4 @@ Polling.prototype._write = function(message){
     this.response.end();
     this._onClose();
   }
-};
\ No newline at end of file
+};
diff --git a/package.json b/package.json
index 836b7407d1..d072c31fa0 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 { "name" : "socket.io"
 , "description" : "The cross-browser WebSocket"
-, "version" : "0.6.1"
+, "version" : "0.6.3"
 , "author" : "LearnBoost"
 , "licenses" :
   [ { "type" : "MIT"