diff --git a/.github/SECURITY.md b/.github/SECURITY.md
index 34605e8b..135f34c8 100644
--- a/.github/SECURITY.md
+++ b/.github/SECURITY.md
@@ -4,13 +4,13 @@
 
 The following versions of `ergebnis/json-normalizer` have active support:
 
-- `^4.1.0`
+- `^4.3.0`
 
 ## Unsupported Versions
 
 The following versions of `ergebnis/json-normalizer` have reached their end of life:
 
-- `<4.1.0`
+- `<4.3.0`
 
 ## Reporting a Vulnerability
 
diff --git a/CHANGELOG.md b/CHANGELOG.md
index b4415e3f..8857ab8f 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 [`4.2.0...main`][4.2.0...main].
+For a full diff see [`4.3.0...main`][4.3.0...main].
+
+## [`4.3.0`][4.3.0]
+
+For a full diff see [`4.2.0...4.3.0`][4.2.0...4.3.0].
 
 ### Changed
 
@@ -482,6 +486,7 @@ For a full diff see [`5d8b3e2...0.1.0`][5d8b3e2...0.1.0].
 [4.0.2]: https://github.com/ergebnis/json-normalizer/releases/tag/4.0.2
 [4.1.0]: https://github.com/ergebnis/json-normalizer/releases/tag/4.1.0
 [4.2.0]: https://github.com/ergebnis/json-normalizer/releases/tag/4.2.0
+[4.3.0]: https://github.com/ergebnis/json-normalizer/releases/tag/4.3.0
 
 [5d8b3e2...0.1.0]: https://github.com/ergebnis/json-normalizer/compare/5d8b3e2...0.1.0
 [0.1.0...0.2.0]: https://github.com/ergebnis/json-normalizer/compare/0.1.0...0.2.0
@@ -515,7 +520,8 @@ For a full diff see [`5d8b3e2...0.1.0`][5d8b3e2...0.1.0].
 [4.0.1...4.0.2]: https://github.com/ergebnis/json-normalizer/compare/4.0.1...4.0.2
 [4.0.2...4.1.0]: https://github.com/ergebnis/json-normalizer/compare/4.0.2...4.1.0
 [4.1.0...4.2.0]: https://github.com/ergebnis/json-normalizer/compare/4.1.0...4.2.0
-[4.2.0...main]: https://github.com/ergebnis/json-normalizer/compare/4.2.0...main
+[4.2.0...4.3.0]: https://github.com/ergebnis/json-normalizer/compare/4.2.0...4.3.0
+[4.3.0...main]: https://github.com/ergebnis/json-normalizer/compare/4.3.0...main
 
 [#1]: https://github.com/ergebnis/json-normalizer/pull/1
 [#2]: https://github.com/ergebnis/json-normalizer/pull/2