diff --git a/index.js b/index.js
index 0c9fe4a..f576253 100644
--- a/index.js
+++ b/index.js
@@ -184,6 +184,7 @@ app.get("/download", async (req, res) => {
       url,
       '-o', '-',
       '--max-filesize', MAX_FILESIZE + 'm',
+      '-S', 'res:' + quality,
       '--no-playlist',
     ])