diff --git a/core/lib/Drupal.php b/core/lib/Drupal.php
index 2587f354647ab7dd1c23140473e0017c6d37eace..f10d4204f70f94e9e45d0dcd9437ef9faba431b8 100644
--- a/core/lib/Drupal.php
+++ b/core/lib/Drupal.php
@@ -82,7 +82,7 @@ class Drupal {
   /**
    * The current system version.
    */
-  const VERSION = '8.5.9-dev';
+  const VERSION = '8.5.10-dev';
 
   /**
    * Core API compatibility.