diff --git a/docs/reference/changelog.rst b/docs/reference/changelog.rst
index 2619b5e3..fb3d1fa5 100644
--- a/docs/reference/changelog.rst
+++ b/docs/reference/changelog.rst
@@ -2,6 +2,17 @@
 Changelog
 *********
 
+4.2.3 (2024-Sep-18)
+-------------------
+
+Application
+===========
+
+- get_arg_or_config now correctly checks the config service if the passed
+  namespace contains the given value but it is None.
+
+For a complete list of commits, check out the `4.2.3`_ release on GitHub.
+
 4.2.2 (2024-Sep-13)
 -------------------