diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1fd0ed08..7f0918ef 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -27,6 +27,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - `README.md` modified
 - Test system modified
 - `Python 3.12` added to `test.yml`
+- `Python 3.13` added to `test.yml`
 - Warning and error messages updated
 - `pycm_util.py` renamed to `utils.py`
 - `pycm_test.py` renamed to `basic_test.py`