diff --git a/composer.json b/composer.json
index ac26cfc2a..0a9dbf589 100644
--- a/composer.json
+++ b/composer.json
@@ -55,6 +55,7 @@
         "fakerphp/faker": "^1.13",
         "nelmio/alice": "^3.8",
         "phpstan/phpstan": "^1.0",
+        "phpstan/phpstan-strict-rules": "^1.0",
         "phpunit/phpunit": "^7.0",
         "symfony/debug-bundle": "^5.1",
         "symfony/dotenv": "^5.1",