diff --git a/composer.json b/composer.json
index 3395166..4d4a1f8 100644
--- a/composer.json
+++ b/composer.json
@@ -17,7 +17,8 @@
     "require": {
         "php": "^8.1",
         "nextcloud/ocp": ">=27",
-        "rector/rector": "^2.0.4"
+        "rector/rector": "^2.0.4",
+        "webmozart/assert": "^1.11"
     },
     "require-dev": {
         "phpunit/phpunit": "^10.5",