diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3bfcad2..8146cb7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,8 @@ before starting to add changes. Use example [placed in the end of the page](#exa
 
 ## [Unreleased]
 
+## [3.21.0] 2024-12-17
+
 - Updated `os2web_audit`.
 - Added patch to get `hook_webform_post_load_data` in webform submissions.
 
@@ -321,7 +323,8 @@ before starting to add changes. Use example [placed in the end of the page](#exa
 - Security in case of vulnerabilities.
 ```
 
-[Unreleased]: https://github.com/OS2Forms/os2forms/compare/3.20.1...HEAD
+[Unreleased]: https://github.com/OS2Forms/os2forms/compare/3.21.0...HEAD
+[3.21.0]: https://github.com/OS2Forms/os2forms/compare/3.20.1...3.21.0
 [3.20.1]: https://github.com/OS2Forms/os2forms/compare/3.20.0...3.20.1
 [3.20.0]: https://github.com/OS2Forms/os2forms/compare/3.19.0...3.20.0
 [3.19.0]: https://github.com/OS2Forms/os2forms/compare/3.18.0...3.19.0