diff --git a/composer.json b/composer.json
index e256cd0..4056268 100644
--- a/composer.json
+++ b/composer.json
@@ -27,7 +27,7 @@
         "drupol/php-conventions": "^1",
         "infection/infection": "^0.13",
         "phptaskman/changelog": "^1.0",
-        "phpunit/phpunit": "^7.5 || ^8",
+        "phpunit/phpunit": "^7.5.6 || ^8",
         "scrutinizer/ocular": "^1"
     },
     "config": {