diff --git a/core/lib/Drupal.php b/core/lib/Drupal.php
index 09a76cd2c5486d7f98f34924f37bbe62f15a0b8f..28835aad8aaf8377fc9fdb00405fb40065607200 100644
--- a/core/lib/Drupal.php
+++ b/core/lib/Drupal.php
@@ -82,7 +82,7 @@ class Drupal {
   /**
    * The current system version.
    */
-  const VERSION = '8.5.5';
+  const VERSION = '8.5.6';
 
   /**
    * Core API compatibility.