diff --git a/admin/dashboard/blueprints/message_push.py b/admin/dashboard/blueprints/message_push.py
index 8ff1c1c..245c3b3 100644
--- a/admin/dashboard/blueprints/message_push.py
+++ b/admin/dashboard/blueprints/message_push.py
@@ -179,6 +179,14 @@ def update_task(task_id):
         if 'content_miniprogram' in data and isinstance(data['content_miniprogram'], dict):
             data['content_miniprogram'] = json.dumps(data['content_miniprogram'])
         
+        # 确保 groups 是 JSON 字符串
+        if 'groups' in data and isinstance(data['groups'], list):
+            data['groups'] = json.dumps(data['groups'])
+            
+        # 确保 preview_recipients 是 JSON 字符串
+        if 'preview_recipients' in data and isinstance(data['preview_recipients'], list):
+            data['preview_recipients'] = json.dumps(data['preview_recipients'])
+        
         # 更新任务
         db.update_task(task_id, data)