diff --git a/app/static/js/utils.js b/app/static/js/utils.js
index b3e3b14..b72e738 100644
--- a/app/static/js/utils.js
+++ b/app/static/js/utils.js
@@ -14,7 +14,7 @@ const formatDuration = function(seconds) {
         parseInt(seconds / 86400),
         parseInt(seconds % 86400 / 3600),
         parseInt(seconds % 3600 / 60),
-        s = parseInt(seconds % 60)
+        parseInt(seconds % 60)
     ]
     return parts.map(p => { return p.toString().padStart(2, '0')}).join(':')
 }