diff --git a/app/chain/tmdb.py b/app/chain/tmdb.py
index b991eae9..28b7d9c5 100644
--- a/app/chain/tmdb.py
+++ b/app/chain/tmdb.py
@@ -6,9 +6,10 @@ from cachetools import cached, TTLCache
 from app import schemas
 from app.chain import ChainBase
 from app.schemas import MediaType
+from app.utils.singleton import Singleton
 
 
-class TmdbChain(ChainBase):
+class TmdbChain(ChainBase, metaclass=Singleton):
     """
     TheMovieDB处理链
     """