diff --git a/index.html b/index.html
index 5f2767e9..8db25cc0 100644
--- a/index.html
+++ b/index.html
@@ -18,7 +18,7 @@
     <form action="">
       <input id="m" autocomplete="off" /><button>Send</button>
     </form>
-    <script src="https://cdn.socket.io/socket.io-1.2.0.js"></script>
+    <script src="https://cdnjs.cloudflare.com/ajax/libs/socket.io/2.0.1/socket.io.js"></script>
     <script src="http://code.jquery.com/jquery-1.11.1.js"></script>
     <script>
       var socket = io();