diff --git a/src/Symfony/Component/HttpKernel/Kernel.php b/src/Symfony/Component/HttpKernel/Kernel.php
index 5808c883d1..69a0e421be 100644
--- a/src/Symfony/Component/HttpKernel/Kernel.php
+++ b/src/Symfony/Component/HttpKernel/Kernel.php
@@ -59,12 +59,12 @@ abstract class Kernel implements KernelInterface, TerminableInterface
     protected $startTime;
     protected $loadClassCache;
 
-    const VERSION         = '2.5.3';
-    const VERSION_ID      = '20503';
+    const VERSION         = '2.5.4-DEV';
+    const VERSION_ID      = '20504';
     const MAJOR_VERSION   = '2';
     const MINOR_VERSION   = '5';
-    const RELEASE_VERSION = '3';
-    const EXTRA_VERSION   = '';
+    const RELEASE_VERSION = '4';
+    const EXTRA_VERSION   = 'DEV';
 
     /**
      * Constructor.