diff --git a/CHANGELOG.md b/CHANGELOG.md
index bd42333..a02c8b4 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]
 
+## [v2.3.1] - 2022-06-29
+
 - [#27](https://github.com/FUSAKLA/promruval/pull/27)
   - typos and wording in validator messages were corrected