diff --git a/CHANGES.rst b/CHANGES.rst
index a3dd556..adc220b 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -3,6 +3,10 @@ Change log
 
 To see earlier changes please see HISTORY.txt.
 
+5.2 (unreleased)
+----------------
+
+
 5.1 (2024-01-03)
 ----------------
 - add support for Python 3.12,
diff --git a/setup.py b/setup.py
index 9d6803e..d59864a 100644
--- a/setup.py
+++ b/setup.py
@@ -23,7 +23,7 @@ def read(name):
 
 
 setup(name='Products.LDAPMultiPlugins',
-      version='5.1',
+      version='5.2.dev0',
       description='LDAP-backed plugins for the Zope PluggableAuthService',
       long_description=read('README.rst'),
       classifiers=[