diff --git a/CHANGELOG.md b/CHANGELOG.md
index 77e1c01d..54ba1828 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,7 +2,7 @@
 
 This file is used to list changes made in each version of the nagios cookbook.
 
-## Unreleased
+## 12.1.0 - *2024-07-30*
 
 Standardise files with files in sous-chefs/repo-management