diff --git a/web/themes/custom/hoeringsportal/assets/js/hide_spinner.js b/web/themes/custom/hoeringsportal/assets/js/hide_spinner.js
index 9fea04fa..7b6067b9 100644
--- a/web/themes/custom/hoeringsportal/assets/js/hide_spinner.js
+++ b/web/themes/custom/hoeringsportal/assets/js/hide_spinner.js
@@ -3,7 +3,7 @@
  * Set timer for iframe.
  */
 
-var timer = setInterval(function () {
+const timer = setInterval(function () {
   const element = document.querySelector('.node--type-hearing iframe')
   if (!element) {
     clearInterval(timer)