diff --git a/composer.json b/composer.json
index f70831bb..ba875d9a 100644
--- a/composer.json
+++ b/composer.json
@@ -50,7 +50,7 @@
         "laminas/laminas-i18n": "^2.7",
         "laminas/laminas-serializer": "^2.2",
         "laminas/laminas-view": "^2.12",
-        "phpunit/phpunit": "10.5.11",
+        "phpunit/phpunit": "10.5.21",
         "squizlabs/php_codesniffer": "^3.5.5",
         "php-coveralls/php-coveralls": "^2.2",
         "phpspec/prophecy-phpunit": "^2.0",