diff --git a/votify/interface/audio.py b/votify/interface/audio.py
index f4e3cbf..4b8daa3 100644
--- a/votify/interface/audio.py
+++ b/votify/interface/audio.py
@@ -52,7 +52,7 @@ class SpotifyAudioInterface(SpotifyBaseInterface):
                 stream_url=stream_url,
                 widevine_pssh=pssh,
             ),
-            file_format="mp4",
+            file_format="m4a",
         )
 
         logger.debug(f"Parsed stream info: {stream_info}")