diff --git a/packages/markitdown/src/markitdown/_stream_info.py b/packages/markitdown/src/markitdown/_stream_info.py
index fa94b98..32a51ef 100644
--- a/packages/markitdown/src/markitdown/_stream_info.py
+++ b/packages/markitdown/src/markitdown/_stream_info.py
@@ -20,9 +20,9 @@ class StreamInfo:
     mimetype: Optional[str] = None
     extension: Optional[str] = None
     charset: Optional[str] = None
-    filename: Optional[str] = (
-        None  # From local path, url, or Content-Disposition header
-    )
+    filename: Optional[
+        str
+    ] = None  # From local path, url, or Content-Disposition header
     local_path: Optional[str] = None  # If read from disk
     url: Optional[str] = None  # If read from url