diff --git a/Classes/Resource/FileDelivery.php b/Classes/Resource/FileDelivery.php
index 5eb6443..01402d4 100644
--- a/Classes/Resource/FileDelivery.php
+++ b/Classes/Resource/FileDelivery.php
@@ -168,7 +168,7 @@ protected function getExtensionConfiguration(): array
     /**
      * TODO: Refactor it to a hash service
      */
-    protected function getHash(string $resourceUri, int $userId, string $userGroupIds, int $validityPeriod = 0): string
+    protected function getHash($resourceUri, $userId, $userGroupIds, $validityPeriod = 0): string
     {
         if ($this->extensionConfiguration['enableGroupCheck']) {
             $hashString = $userId . $userGroupIds . $resourceUri . $validityPeriod;