diff --git a/setup.py b/setup.py
index b07bd2a..c04ad38 100644
--- a/setup.py
+++ b/setup.py
@@ -19,7 +19,7 @@ def _read(name):
 
 setup(
     name='Products.%s' % NAME,
-    version='3.1.0',
+    version='3.1.0.dev0',
     description='Uid product for the Zope Content Management Framework',
     long_description=README,
     classifiers=[