diff --git a/lib/Doctrine/ORM/Version.php b/lib/Doctrine/ORM/Version.php
index 0a439da47..a22c96907 100644
--- a/lib/Doctrine/ORM/Version.php
+++ b/lib/Doctrine/ORM/Version.php
@@ -35,7 +35,7 @@ class Version
     /**
      * Current Doctrine Version
      */
-    const VERSION = '2.6.3';
+    const VERSION = '2.6.4-DEV';
 
     /**
      * Compares a Doctrine version with the current one.