diff --git a/static/js/song-controls.js b/static/js/song-controls.js
index 09e03c1..164d206 100644
--- a/static/js/song-controls.js
+++ b/static/js/song-controls.js
@@ -2,8 +2,8 @@ const controls = document.querySelector(".controls");
 const song = document.querySelector("iframe.song").contentWindow;
 
 // Autoscroll
-var scroll;
-var scrollTimeout = 60;
+let scroll;
+let scrollTimeout = 60;
 const minTimeout = 10;
 const maxTimeout = 120;
 const scrollIncrement = 20;