diff --git a/composer.json b/composer.json
index ab61976..68e9899 100644
--- a/composer.json
+++ b/composer.json
@@ -32,7 +32,7 @@
     },
     "require-dev": {
         "phpspec/prophecy-phpunit": ">=2.0",
-        "phpunit/phpunit": ">=9.5",
+        "phpunit/phpunit": ">=9.6.21",
         "laminas/laminas-coding-standard": ">=2.3",
         "vimeo/psalm": ">=4.23"
     },