diff --git a/index.js b/index.js
index 69331c2..bb4e2d4 100644
--- a/index.js
+++ b/index.js
@@ -147,6 +147,8 @@ app.get("/download", async (req, res) => {
         '-preset', preset,
         '-f', format,
         '-loglevel', 'error',
+        '-c:v', 'copy',
+        '-c:a', 'libmp3lame',
         '-'
       ], {
         stdio: [