diff --git a/CHANGES.rst b/CHANGES.rst
index c34aeb87..cbda9d82 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,6 +1,12 @@
 Changelog
 =========
 
+6.1 (unreleased)
+----------------
+
+- Nothing changed yet.
+
+
 6.0 (2020-10-08)
 ----------------
 
diff --git a/setup.py b/setup.py
index e152b332..2b598458 100644
--- a/setup.py
+++ b/setup.py
@@ -16,7 +16,7 @@
 
 setup(
     name='Products.ZCatalog',
-    version='6.0',
+    version='6.1.dev0',
     url='https://github.com/zopefoundation/Products.ZCatalog',
     license='ZPL 2.1',
     description="Zope's indexing and search solution.",