diff --git a/pyrogram/types/messages_and_media/animation.py b/pyrogram/types/messages_and_media/animation.py
index 3502ac4c..7a0231d1 100644
--- a/pyrogram/types/messages_and_media/animation.py
+++ b/pyrogram/types/messages_and_media/animation.py
@@ -23,7 +23,7 @@ from typing import List
 import pyrogram
 from pyrogram import raw, utils
 from pyrogram import types
-from pyrogram.file_id import FileId, FileType, FileUniqueId, FileUniqueType
+from pyrogram.file_id import FileId, FileType, FileUniqueId, FileUniqueType, ThumbnailSource
 from ..object import Object