diff --git a/CHANGES.txt b/CHANGES.txt
index 75c1488..a1f40e8 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -2,6 +2,10 @@
 CHANGES
 =======
 
+1.0.1 (unreleased)
+------------------
+
+
 1.0 (2009-07-23)
 ----------------
 
diff --git a/setup.py b/setup.py
index 8bbaee3..c08c359 100644
--- a/setup.py
+++ b/setup.py
@@ -20,7 +20,7 @@ def read(*rnames):
     return open(os.path.join(os.path.dirname(__file__), *rnames)).read()
 
 setup(name = 'zope.ramcache',
-      version = '1.0',
+      version = '1.0.1dev',
       author='Zope Corporation and Contributors',
       author_email='zope-dev@zope.org',
       description='Zope RAM Cache',