diff --git a/www-api/app/Controllers/WrenchApi.php b/www-api/app/Controllers/WrenchApi.php
index 8d95c1e6..6ffefc2f 100644
--- a/www-api/app/Controllers/WrenchApi.php
+++ b/www-api/app/Controllers/WrenchApi.php
@@ -662,7 +662,8 @@ class WrenchApi extends BaseController
         return json_encode( $final_out );
     }
 
-    private function childBanners(){
+    private function childBanners(): array
+    {
         $bannerArray = array(
             "pending" => [
                 'banner' => [