diff --git a/core/lib/Drupal.php b/core/lib/Drupal.php
index da3e02a1f33e19149a062a8f636a1cda5f2bf31a..6cd063f4118ba84bbf06fb14467a61903ec31358 100644
--- a/core/lib/Drupal.php
+++ b/core/lib/Drupal.php
@@ -81,7 +81,7 @@ class Drupal {
   /**
    * The current system version.
    */
-  const VERSION = '8.0.0-dev';
+  const VERSION = '8.0.0-beta15';
 
   /**
    * Core API compatibility.