diff --git a/core/Version.php b/core/Version.php
index 5f8dcad262ac5886c5661d00017926a063806b6c..023de9f87f5a94bff64706c08908fc130c19c573 100644
--- a/core/Version.php
+++ b/core/Version.php
@@ -17,5 +17,5 @@
  */
 final class Piwik_Version
 {
-	const VERSION = '1.5.2';
+	const VERSION = '1.5.2b1';
 }