diff --git a/.github/SECURITY.md b/.github/SECURITY.md
index 95142d07..68f56336 100644
--- a/.github/SECURITY.md
+++ b/.github/SECURITY.md
@@ -4,13 +4,13 @@
 
 The following versions of `ergebnis/composer-normalize` have active support:
 
-- `^2.42.0`
+- `^2.43.0`
 
 ## Unsupported Versions
 
 The following versions of `ergebnis/composer-normalize` have reached their end of life:
 
-- `<2.42.0`
+- `<2.43.0`
 
 ## Reporting a Vulnerability
 
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0980ce02..f3cb7255 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,7 +6,11 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 ## Unreleased
 
-For a full diff see [`2.42.0...main`][2.42.0...main].
+For a full diff see [`2.43.0...main`][2.43.0...main].
+
+## [`2.43.0`][2.43.0]
+
+For a full diff see [`2.42.0...2.43.0`][2.42.0...2.43.0].
 
 ### Changed
 
@@ -989,6 +993,7 @@ For a full diff see [`81bc3a8...0.1.0`][81bc3a8...0.1.0].
 [2.41.0]: https://github.com/ergebnis/composer-normalize/releases/tag/2.41.0
 [2.41.1]: https://github.com/ergebnis/composer-normalize/releases/tag/2.41.1
 [2.42.0]: https://github.com/ergebnis/composer-normalize/releases/tag/2.42.0
+[2.43.0]: https://github.com/ergebnis/composer-normalize/releases/tag/2.43.0
 
 [81bc3a8...0.1.0]: https://github.com/ergebnis/composer-normalize/compare/81bc3a8...0.1.0
 [0.1.0...0.2.0]: https://github.com/ergebnis/composer-normalize/compare/0.1.0...0.2.0
@@ -1083,7 +1088,8 @@ For a full diff see [`81bc3a8...0.1.0`][81bc3a8...0.1.0].
 [2.40.0...2.41.0]: https://github.com/ergebnis/composer-normalize/compare/2.40.0...2.41.0
 [2.41.0...2.41.1]: https://github.com/ergebnis/composer-normalize/compare/2.41.0...2.41.1
 [2.41.1...2.42.0]: https://github.com/ergebnis/composer-normalize/compare/2.41.1...2.42.0
-[2.42.0...main]: https://github.com/ergebnis/composer-normalize/compare/2.42.0...main
+[2.42.0...2.43.0]: https://github.com/ergebnis/composer-normalize/compare/2.42.0...2.43.0
+[2.43.0...main]: https://github.com/ergebnis/composer-normalize/compare/2.43.0...main
 
 [#1]: https://github.com/ergebnis/composer-normalize/pull/1
 [#2]: https://github.com/ergebnis/composer-normalize/pull/2