diff --git a/chapter04/views/index.ejs b/chapter04/views/index.ejs
index 3e073ea..986cc73 100644
--- a/chapter04/views/index.ejs
+++ b/chapter04/views/index.ejs
@@ -4,9 +4,9 @@
   <meta charset="utf-8">
   <title>Nockmarket</title>
   <meta name="viewport" content="width=device-width, initial-scale=1.0">
-  <link href="http://twitter.github.com/bootstrap/assets/css/bootstrap.css" rel="stylesheet">
+  <link href="//netdna.bootstrapcdn.com/twitter-bootstrap/2.3.2/css/bootstrap-combined.min.css" rel="stylesheet">
   <link href="http://spbooks.github.com/nodejs1/docs.css" rel="stylesheet">
-  <script src="http://twitter.github.com/bootstrap/assets/js/google-code-prettify/prettify.js"></script>
+  <script src="//netdna.bootstrapcdn.com/twitter-bootstrap/2.3.2/js/bootstrap.min.js"></script>
   <script type="text/javascript" src="http://spbooks.github.com/nodejs1/jquery.js"></script>
   <script type="text/javascript" src="http://spbooks.github.com/nodejs1/bootstrap-button.js"></script>
   <script type="text/javascript" src="http://spbooks.github.com/nodejs1/bootstrap-modal.js"></script>
@@ -94,4 +94,4 @@
   </header>
 </div>
 </body>
-</html>
\ No newline at end of file
+</html>