diff --git a/cms/__init__.py b/cms/__init__.py
index 6204852f4a..53f1721cc3 100644
--- a/cms/__init__.py
+++ b/cms/__init__.py
@@ -46,7 +46,7 @@
 ]
 
 
-__version__ = "1.5.1"
+__version__ = "1.6.dev0"
 
 
 # Instantiate or import these objects.