diff --git a/type_def/mvw_json_response.py b/type_def/mvw_json_response.py
index c1a0b09..df4ae25 100644
--- a/type_def/mvw_json_response.py
+++ b/type_def/mvw_json_response.py
@@ -10,7 +10,7 @@ class Show(BaseModel):
     description: str
     timestamp: int
     duration: int
-    size: int
+    size: Optional[int]
     url_website: str
     url_subtitle: str
     url_video: str