diff --git a/CHANGES.rst b/CHANGES.rst
index de60004..9c31afc 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,8 +1,8 @@
 Changes
 =======
 
-4.3.0 (unreleased)
-------------------
+4.3 (2017-05-11)
+----------------
 
 - Add support for Python 3.5 and 3.6.
 
diff --git a/setup.py b/setup.py
index 0415873..c42cb2f 100644
--- a/setup.py
+++ b/setup.py
@@ -39,7 +39,7 @@ def alltests():
 
 
 setup(name='zope.authentication',
-      version='4.3.0.dev0',
+      version='4.3',
       author='Zope Foundation and Contributors',
       author_email='zope-dev@zope.org',
       description='Definition of authentication basics for the Zope Framework',