@@ -59,7 +59,7 @@ class Sora(SimpleService):
                     width, height = img.size
                     required_size = (720, 1280)
                     current_size = (width, height)
-                    if current_size not in required_size:
+                    if current_size != required_size:
                         raise UnsupportedSize(current_size, required_size)
                     buf = BytesIO()
                     img.save(buf, format="PNG")