diff --git a/packages/markitdown/src/markitdown/_markitdown.py b/packages/markitdown/src/markitdown/_markitdown.py
index 702b10c68..1be16ab8c 100644
--- a/packages/markitdown/src/markitdown/_markitdown.py
+++ b/packages/markitdown/src/markitdown/_markitdown.py
@@ -362,11 +362,7 @@ def convert_stream(
         # Check if we have a seekable stream. If not, load the entire stream into memory.
         if not stream.seekable():
             buffer = io.BytesIO()
-            while True:
-                chunk = stream.read(4096)
-                if not chunk:
-                    break
-                buffer.write(chunk)
+            shutil.copyfileobj(stream, buffer)
             buffer.seek(0)
             stream = buffer