diff --git a/Slim/App.php b/Slim/App.php
index ec3d9cf8a..53c3776b6 100644
--- a/Slim/App.php
+++ b/Slim/App.php
@@ -53,7 +53,7 @@ class App
      *
      * @var string
      */
-    const VERSION = '3.12';
+    const VERSION = '3.12.1-dev';
 
     /**
      * Container