diff --git a/server/entertainment_decider/extractors/media/base.py b/server/entertainment_decider/extractors/media/base.py
index 0afa91a..32ab1bc 100644
--- a/server/entertainment_decider/extractors/media/base.py
+++ b/server/entertainment_decider/extractors/media/base.py
@@ -15,7 +15,7 @@ class MediaExtractor(GeneralExtractor[MediaElement, T]):
 
     # abstract
 
-    def _get_author_data(self, data: Dict) -> Optional[AuthorExtractedData]:
+    def _get_author_data(self, data: T) -> Optional[AuthorExtractedData]:
         return None
 
     # defined