diff --git a/core/lib/Drupal.php b/core/lib/Drupal.php
index 443bf4575c8cc33c084e2b276d507e3dafdfc972..3f491e543be7c0af04843aa7e7b6f998079f7f63 100644
--- a/core/lib/Drupal.php
+++ b/core/lib/Drupal.php
@@ -81,7 +81,7 @@ class Drupal {
   /**
    * The current system version.
    */
-  const VERSION = '8.3.0-dev';
+  const VERSION = '8.3.0-alpha1';
 
   /**
    * Core API compatibility.