diff --git a/CHANGELOG.md b/CHANGELOG.md
index bc427f6..fc3261c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,10 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
+## [3.9.1] - 2023-11-16
+
+- **Revert**: Export of type definitions, depending on whether it is ES Module or CommonJS
+
 ## [3.9.0] - 2023-11-14
 
 - Export of type definitions, depending on whether it is ES Module or CommonJS