diff --git a/CHANGES.txt b/CHANGES.txt
index cd05d91..6b711f2 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -1,6 +1,12 @@
 CHANGELOG
 =====================
 
+0.12.21 (unreleased)
+--------------------
+
+- Nothing changed yet.
+
+
 0.12.20 (2014-05-15)
 --------------------
 - better version handling [kiorky]
diff --git a/setup.py b/setup.py
index e4f6dce..d4ac227 100644
--- a/setup.py
+++ b/setup.py
@@ -17,7 +17,7 @@ long_description="SOAPpy provides tools for building SOAP clients and servers.
     +'\n'+read('CHANGES.txt')
 setup(
     name="SOAPpy",
-    version='0.12.20',
+    version='0.12.21.dev0',
     description="SOAP Services for Python",
     maintainer="Gregory Warnes, kiorky",
     maintainer_email="Gregory.R.Warnes@Pfizer.com, kiorky@cryptelium.net",