diff --git a/CHANGES.rst b/CHANGES.rst
index 6e354c3..920637e 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -3,7 +3,7 @@ Changelog
 
 For changes before version 3.0, see ``HISTORY.rst``.
 
-6.3 (unreleased)
+6.3 (2023-11-20)
 ----------------
 
 - Add support for Python 3.12.
diff --git a/setup.py b/setup.py
index 0b0dc0a..6e6e44a 100644
--- a/setup.py
+++ b/setup.py
@@ -32,7 +32,7 @@
                  join('include', 'Acquisition', 'Acquisition.h')]),
 ]
 
-version = '6.3.dev0'
+version = '6.3'
 
 
 setup(name='AccessControl',