diff --git a/src/Symfony/Component/HttpKernel/Kernel.php b/src/Symfony/Component/HttpKernel/Kernel.php
index 0dcdc717d9..785ce496f5 100644
--- a/src/Symfony/Component/HttpKernel/Kernel.php
+++ b/src/Symfony/Component/HttpKernel/Kernel.php
@@ -73,12 +73,12 @@ abstract class Kernel implements KernelInterface, RebootableInterface, Terminabl
     private $requestStackSize = 0;
     private $resetServices = false;
 
-    const VERSION = '4.3.0-DEV';
+    const VERSION = '4.3.0-RC1';
     const VERSION_ID = 40300;
     const MAJOR_VERSION = 4;
     const MINOR_VERSION = 3;
     const RELEASE_VERSION = 0;
-    const EXTRA_VERSION = 'DEV';
+    const EXTRA_VERSION = 'RC1';
 
     const END_OF_MAINTENANCE = '01/2020';
     const END_OF_LIFE = '07/2020';