diff --git a/core/Version.php b/core/Version.php
index 8abb8083fb4eff27d01ef35bdb9b5c3d60fd7220..0faa9963d557c570713887254f3d8eaf9f958227 100644
--- a/core/Version.php
+++ b/core/Version.php
@@ -20,7 +20,7 @@ final class Version
      * The current Piwik version.
      * @var string
      */
-    const VERSION = '2.15.1-b3';
+    const VERSION = '2.15.1-b4';
 
     public function isStableVersion($version)
     {