diff --git a/ChangeLog-10.5.md b/ChangeLog-10.5.md
index 7e2be9b8082..71d2c535183 100644
--- a/ChangeLog-10.5.md
+++ b/ChangeLog-10.5.md
@@ -2,7 +2,7 @@
 
 All notable changes of the PHPUnit 10.5 release series are documented in this file using the [Keep a CHANGELOG](https://keepachangelog.com/) principles.
 
-## [10.5.21] - 2024-MM-DD
+## [10.5.21] - 2024-06-15
 
 ### Changed
 
@@ -210,7 +210,7 @@ All notable changes of the PHPUnit 10.5 release series are documented in this fi
 
 * [#5563](https://github.com/sebastianbergmann/phpunit/issues/5563): `createMockForIntersectionOfInterfaces()` does not automatically register mock object for expectation verification
 
-[10.5.21]: https://github.com/sebastianbergmann/phpunit/compare/10.5.20...10.5
+[10.5.21]: https://github.com/sebastianbergmann/phpunit/compare/10.5.20...10.5.21
 [10.5.20]: https://github.com/sebastianbergmann/phpunit/compare/10.5.19...10.5.20
 [10.5.19]: https://github.com/sebastianbergmann/phpunit/compare/10.5.18...10.5.19
 [10.5.18]: https://github.com/sebastianbergmann/phpunit/compare/10.5.17...10.5.18
diff --git a/src/Runner/Version.php b/src/Runner/Version.php
index 38b6dea393b..adf9a4175a0 100644
--- a/src/Runner/Version.php
+++ b/src/Runner/Version.php
@@ -34,7 +34,7 @@ public static function id(): string
         }
 
         if (self::$version === '') {
-            self::$version = (new VersionId('10.5.20', dirname(__DIR__, 2)))->asString();
+            self::$version = (new VersionId('10.5.21', dirname(__DIR__, 2)))->asString();
         }
 
         return self::$version;