diff --git a/README.md b/README.md
index e0110eb7c..ed7184f4e 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# lodash v3.10.1
+# lodash v4.0.0-pre
 
 The [modern build](https://github.com/lodash/lodash/wiki/Build-Differences) of [lodash](https://lodash.com/) with packages for [Bower](http://bower.io/), [Component](http://component.github.io/), & [Volo](http://volojs.org/).
 
diff --git a/lodash.js b/lodash.js
index 18f4337d9..5888858c9 100644
--- a/lodash.js
+++ b/lodash.js
@@ -1,6 +1,6 @@
 /**
  * @license
- * lodash 3.10.1 <https://lodash.com/>
+ * lodash 4.0.0-pre <https://lodash.com/>
  * Copyright 2012-2015 The Dojo Foundation <http://dojofoundation.org/>
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  * Copyright 2009-2015 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
@@ -12,7 +12,7 @@
   var undefined;
 
   /** Used as the semantic version number. */
-  var VERSION = '3.10.1';
+  var VERSION = '4.0.0-pre';
 
   /** Used to compose bitmasks for wrapper metadata. */
   var BIND_FLAG = 1,