diff --git a/CHANGES.rst b/CHANGES.rst
index 623ebac..ee33a03 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -7,6 +7,9 @@ Changelog
 - Update tox.ini for latest tox.
   [stefan]
 
+- Replace deprecated ``python setup.py build_sphinx`` in tox.ini.
+  [stefan]
+
 
 2.2 - 2022-11-17
 ----------------