diff --git a/src/Symfony/Component/HttpKernel/Kernel.php b/src/Symfony/Component/HttpKernel/Kernel.php
index b3ab97c41a..7fdb5466d1 100644
--- a/src/Symfony/Component/HttpKernel/Kernel.php
+++ b/src/Symfony/Component/HttpKernel/Kernel.php
@@ -58,7 +58,7 @@ abstract class Kernel implements KernelInterface, TerminableInterface
     protected $classes;
     protected $errorReportingLevel;
 
-    const VERSION = '2.2.0-DEV';
+    const VERSION = '2.1.0-DEV';
 
     /**
      * Constructor.