diff --git a/CHANGES.rst b/CHANGES.rst
index 24ac270..31af8ff 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -2,6 +2,12 @@
  CHANGES
 =========
 
+2.2.1 (unreleased)
+==================
+
+- Nothing changed yet.
+
+
 2.2.0 (2018-10-19)
 ==================
 
diff --git a/setup.py b/setup.py
index 658d348..dbc7df6 100644
--- a/setup.py
+++ b/setup.py
@@ -51,7 +51,7 @@ def read(*rnames):
 
 setup(
     name="z3c.baseregistry",
-    version='2.2.0',
+    version='2.2.1.dev0',
     author="Stephan Richter, Roger Ineichen and the Zope Community",
     author_email="zope-dev@zope.org",
     description="Manage IComponents instances using Python code and ZCML.",