diff --git a/CHANGES.rst b/CHANGES.rst
index 496f117..ea015b0 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -2,6 +2,12 @@
  CHANGES
 =========
 
+4.6 (unreleased)
+================
+
+- Nothing changed yet.
+
+
 4.5 (2018-10-19)
 ================
 
diff --git a/setup.py b/setup.py
index 03b553a..75b2ddf 100644
--- a/setup.py
+++ b/setup.py
@@ -59,7 +59,7 @@ def alltests():
 
 setup(
     name='zope.i18n',
-    version='4.5',
+    version='4.6.dev0',
     author='Zope Foundation and Contributors',
     author_email='zope-dev@zope.org',
     description='Zope Internationalization Support',