diff --git a/lib/utils/cron-jobs.js b/lib/utils/cron-jobs.js
index be036f46..b1d1bc0c 100644
--- a/lib/utils/cron-jobs.js
+++ b/lib/utils/cron-jobs.js
@@ -50,7 +50,7 @@ const clearChannels = () => {
 
 const clearFiles = () => {
   // Remove temp audiofiles that were not auto deleted older 300 min (or CLEANUP_INTERVAL if set) from TMP_FOLDER
-  let maxAge = JAMBONZ_CLEANUP_INTERVAL_MINS || 300;
+  const maxAge = JAMBONZ_CLEANUP_INTERVAL_MINS || 300;
   execSync(`/usr/local/bin/cleanup-temp-audiofiles.sh ${maxAge} ${TMP_FOLDER};`);
 };