diff --git a/composer.json b/composer.json
index 06f20b10..86e01498 100644
--- a/composer.json
+++ b/composer.json
@@ -16,6 +16,7 @@
     },
     "require-dev": {
         "phpunit/phpunit": "^10.5",
+        "dg/bypass-finals": "^1.8",
         "dms/phpunit-arraysubset-asserts": "^0.5",
         "fpdf/fpdf": "^1.85",
         "friendsofphp/php-cs-fixer": "^3.15",