diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7f879695..d77eab70 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,7 +8,7 @@
 
 **Other Changes**
 
-* Cleaned up code using `flake8` tool and added it as a permanent check on pull requests. The tool filtered out a number of unused variables and imports, which wastes CPU time and memory. Every bit helps. PRs #394 and #397.
+* Cleaned up code using `flake8` tool and added it as a permanent check on pull requests. The tool filtered out a number of unused variables and imports, which wastes CPU time and memory. Every bit helps. PRs #394, #397 and #401.
 * Added contributing guide, code of conduct and issue templates. Direct push to main, and PR #398.