diff --git a/mutalyzer/__init__.py b/mutalyzer/__init__.py
index d1d5bf5401ae28ab9ff500f9182a05c855b0c43e..e5dd2cb724a9931f5e89fe2699808ec31270cb7b 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-19')
+__version_info__ = ('2', '0', 'beta-20', 'dev')
 __date__ = '21 Jun 2012'