diff --git a/free_one_api/impls/adapter/gpt4free.py b/free_one_api/impls/adapter/gpt4free.py
index 155b35e..0e9b396 100644
--- a/free_one_api/impls/adapter/gpt4free.py
+++ b/free_one_api/impls/adapter/gpt4free.py
@@ -134,7 +134,8 @@ async def _select_provider(self):
             'Acytoo',
             'BaseProvider',
             'Bing',
-            'ChatBase'
+            'ChatBase',
+            'ChatgptDemo',
         ]
 
         for provider in providers: