diff --git a/app/Http/Requests/Admin/GroupRequest.php b/app/Http/Requests/Admin/GroupRequest.php
index e1eaf74d..133fd0f8 100644
--- a/app/Http/Requests/Admin/GroupRequest.php
+++ b/app/Http/Requests/Admin/GroupRequest.php
@@ -58,7 +58,7 @@ class GroupRequest extends FormRequest
 
             'configs.scan_configs.drivers.nsfwjs.api_url' => [$requiredIfReview('nsfwjs')],
             'configs.scan_configs.drivers.nsfwjs.attr_name' => [$requiredIfReview('nsfwjs'), 'nullable'],
-            'configs.scan_configs.drivers.nsfwjs.threshold' => [$requiredIfReview('nsfwjs'), 'nullable', 'between:1,100'],
+            'configs.scan_configs.drivers.nsfwjs.threshold' => [$requiredIfReview('nsfwjs'), 'nullable', 'integer', 'between:1,100'],
 
             'configs.is_enable_original_protection' => 'boolean',
             'configs.image_cache_ttl' => 'nullable|numeric',