diff --git a/IPython/core/release.py b/IPython/core/release.py
index 4a137af..de540a9 100644
--- a/IPython/core/release.py
+++ b/IPython/core/release.py
@@ -21,9 +21,9 @@ name = 'ipython'
 # bdist_deb does not accept underscores (a Debian convention).
 
 development = True    # change this to False to do a release
-version_base = '0.11'
+version_base = '0.11.alpha1'
 branch = 'ipython'
-revision = '1363'
+revision = '1223'
 
 if development:
     if branch == 'ipython':