diff --git a/dzunlock.user.js b/dzunlock.user.js
index 10c5f1e..7552946 100644
--- a/dzunlock.user.js
+++ b/dzunlock.user.js
@@ -183,9 +183,9 @@ async function renewAccessToken() {
 unsafeWindow.dzPlayer.setTrackList = (function (old) {
     return function (...args) {
         // needed for player to accept flac url responses
-        args[0].data.forEach(function (_, i, _) {
+        for (let i = args[0].data; i < args[0].data.length; i++) {
             args[0].data[i].FILESIZE_FLAC = "1"
-        })
+        }
 
         log(args)