diff --git a/src/Symfony/Component/HttpKernel/Kernel.php b/src/Symfony/Component/HttpKernel/Kernel.php
index 3522aaa770..03c3bb0412 100644
--- a/src/Symfony/Component/HttpKernel/Kernel.php
+++ b/src/Symfony/Component/HttpKernel/Kernel.php
@@ -74,15 +74,15 @@ abstract class Kernel implements KernelInterface, RebootableInterface, Terminabl
 
     private static $freshCache = [];
 
-    const VERSION = '5.2.0-DEV';
-    const VERSION_ID = 50200;
+    const VERSION = '5.3.0-DEV';
+    const VERSION_ID = 50300;
     const MAJOR_VERSION = 5;
-    const MINOR_VERSION = 2;
+    const MINOR_VERSION = 3;
     const RELEASE_VERSION = 0;
     const EXTRA_VERSION = 'DEV';
 
-    const END_OF_MAINTENANCE = '07/2021';
-    const END_OF_LIFE = '07/2021';
+    const END_OF_MAINTENANCE = '05/2021';
+    const END_OF_LIFE = '01/2022';
 
     public function __construct(string $environment, bool $debug)
     {