diff --git a/composer.json b/composer.json
index 2bde674..8a5e701 100644
--- a/composer.json
+++ b/composer.json
@@ -33,6 +33,7 @@
     "hashids/hashids": "^3.0",
     "infection/infection": "^0.9",
     "pascaldevink/shortuuid": "^2.1",
+    "phpmd/phpmd": "^2.0",
     "phpstan/phpstan": "~0.11.12",
     "phpstan/phpstan-deprecation-rules": "~0.11.2",
     "phpstan/phpstan-strict-rules": "~0.11.1",