diff --git a/Controller/ApiController.php b/Controller/ApiController.php
index d97c57d..076d7d2 100644
--- a/Controller/ApiController.php
+++ b/Controller/ApiController.php
@@ -20,13 +20,10 @@ use Modules\Admin\Models\Account;
 use Modules\Admin\Models\AccountMapper;
 use Modules\Admin\Models\AccountPermission;
 use Modules\Admin\Models\AccountPermissionMapper;
-use Modules\Admin\Models\NullAccountPermission;
 use Modules\Admin\Models\Group;
 use Modules\Admin\Models\GroupMapper;
 use Modules\Admin\Models\GroupPermission;
 use Modules\Admin\Models\GroupPermissionMapper;
-use Modules\Admin\Models\NullGroupPermission;
-use Modules\Admin\Models\PermissionState;
 use Modules\Admin\Models\ModuleStatusUpdateType;
 
 use phpOMS\Account\AccountStatus;
diff --git a/Controller/BackendController.php b/Controller/BackendController.php
index 6c64105..49f0400 100644
--- a/Controller/BackendController.php
+++ b/Controller/BackendController.php
@@ -152,7 +152,7 @@ final class BackendController extends Controller
 
         if (!isset($permissions) || $permissions instanceof NullAccountPermission) {
             $permissions = [];
-        } elseif (!is_array($permissions)) {
+        } elseif (!\is_array($permissions)) {
             $permissions = [$permissions];
         }
 
@@ -233,7 +233,7 @@ final class BackendController extends Controller
 
         if (!isset($permissions) || $permissions instanceof NullGroupPermission) {
             $permissions = [];
-        } elseif (!is_array($permissions)) {
+        } elseif (!\is_array($permissions)) {
             $permissions = [$permissions];
         }