diff --git a/CHANGES.rst b/CHANGES.rst
index b6a0486..3b2e2ff 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,6 +1,10 @@
 Change log
 ==========
 
+4.4 (unreleased)
+----------------
+
+
 4.3 (2019-05-18)
 ----------------
 - Add support for the bookmarkable URLs ZMI feature
diff --git a/setup.py b/setup.py
index 82494e0..291130a 100644
--- a/setup.py
+++ b/setup.py
@@ -17,7 +17,7 @@
 
 
 setup(name='Products.ExternalMethod',
-      version='4.3',
+      version='4.4.dev0',
       url='https://github.com/zopefoundation/Products.ExternalMethod',
       project_urls={
         'Issue Tracker': ('https://github.com/zopefoundation/'