diff --git a/pyrogram/types/input_media/input_media_video.py b/pyrogram/types/input_media/input_media_video.py
index ab1823d339..cddb94b4f4 100644
--- a/pyrogram/types/input_media/input_media_video.py
+++ b/pyrogram/types/input_media/input_media_video.py
@@ -35,7 +35,7 @@ class InputMediaVideo(InputMedia):
             pass a binary file-like object with its attribute “.name” set for in-memory uploads or
             pass an HTTP URL as a string for Telegram to get a video from the Internet.
 
-        thumb (``str``):
+        thumb (``str`` | ``BinaryIO``):
             Thumbnail of the video sent.
             The thumbnail should be in JPEG format and less than 200 KB in size.
             A thumbnail's width and height should not exceed 320 pixels.
@@ -71,7 +71,7 @@ class InputMediaVideo(InputMedia):
     def __init__(
         self,
         media: Union[str, BinaryIO],
-        thumb: str = None,
+        thumb: Union[str, BinaryIO] = None,
         caption: str = "",
         parse_mode: Optional["enums.ParseMode"] = None,
         caption_entities: List[MessageEntity] = None,