diff --git a/composer.json b/composer.json
index e493a2f..6626608 100644
--- a/composer.json
+++ b/composer.json
@@ -15,7 +15,8 @@
     ],
     "require": {
         "php": ">=7.2",
-        "phpunit/phpunit": "^9.0"
+        "phpunit/phpunit": "^9.0",
+        "phpunit/php-code-coverage": "^8.0"
     },
     "autoload": {
         "psr-4": {