diff --git a/core/Version.php b/core/Version.php
index cb95e51ab33323293b822099aef0ee5af43284f2..a2a09aa0ccf808087d7ae8f788f91d09f9987f6b 100644
--- a/core/Version.php
+++ b/core/Version.php
@@ -20,7 +20,7 @@ final class Version
      * The current Piwik version.
      * @var string
      */
-    const VERSION = '3.1.1';
+    const VERSION = '3.1.2-b1';
 
     public function isStableVersion($version)
     {