diff --git a/IPython/html/static/base/js/namespace.js b/IPython/html/static/base/js/namespace.js
index fae0c25c0..47e3abea7 100644
--- a/IPython/html/static/base/js/namespace.js
+++ b/IPython/html/static/base/js/namespace.js
@@ -7,7 +7,7 @@
 
 var IPython = IPython || {};
 
-IPython.version = "2.0.0";
+IPython.version = "2.1.0-dev";
 
 IPython.namespace = function (ns_string) {
     "use strict";