diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5ab61b2..f173e72 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+- add Ruby 3.3 support [#99](https://github.com/kibitan/masking/pull/99)
+
 ## [v1.1.2] - 2023-09-24
 
 ### Added