diff --git a/mutalyzer/__init__.py b/mutalyzer/__init__.py
index c397b48bc0ddd4148d89364a82c906fba47bdb61..426c8e052daaa03fa46faf50a2aa0075ea008647 100644
--- a/mutalyzer/__init__.py
+++ b/mutalyzer/__init__.py
@@ -20,9 +20,9 @@ import os
 #
 # [1] http://peak.telecommunity.com/DevCenter/setuptools#specifying-your-project-s-version
 
-RELEASE = True
+RELEASE = False
 
-__version_info__ = ('2', '0', 'beta-20')
+__version_info__ = ('2', '0', 'beta-21', 'dev')
 __date__ = '11 Jul 2012'