diff --git a/composer.json b/composer.json
index 800c8397ba9..2ee601aedbe 100644
--- a/composer.json
+++ b/composer.json
@@ -43,7 +43,7 @@
         "phpstan/phpstan": "1.11.1",
         "phpstan/phpstan-phpunit": "1.4.0",
         "phpstan/phpstan-strict-rules": "^1.6",
-        "phpunit/phpunit": "10.5.20",
+        "phpunit/phpunit": "10.5.21",
         "psalm/plugin-phpunit": "0.19.0",
         "slevomat/coding-standard": "8.13.1",
         "squizlabs/php_codesniffer": "3.9.2",