diff --git a/client/addPodcast.html b/client/addPodcast.html
index 633f935..3789de0 100644
--- a/client/addPodcast.html
+++ b/client/addPodcast.html
@@ -170,7 +170,7 @@
             }
             var self = this;
             self.searching = true;
-            let formData = new FormData();
+            var formData = new FormData();
 
             formData.append("file", currentFile);
             axios
diff --git a/client/episodes.html b/client/episodes.html
index 9094993..a49172a 100644
--- a/client/episodes.html
+++ b/client/episodes.html
@@ -260,7 +260,7 @@
         return false;
       }
       function changePlayedStatus(id, status) {
-        let endpoint = status ? "markPlayed" : "markUnplayed";
+        var endpoint = status ? "markPlayed" : "markUnplayed";
         axios
           .get("/podcastitems/" + id + "/" + endpoint, {
             isPlayed: status,
@@ -289,7 +289,7 @@
         return false;
       }
       function changeBookmarkStatus(id, status) {
-        let endpoint = status ? "bookmark" : "unbookmark";
+        var endpoint = status ? "bookmark" : "unbookmark";
         axios
           .get("/podcastitems/" + id + "/" + endpoint, {
             isPlayed: status,
diff --git a/client/index.html b/client/index.html
index 0225934..46e04ef 100644
--- a/client/index.html
+++ b/client/index.html
@@ -261,7 +261,7 @@
             this.socket.send(getWebsocketMessage("Enqueue",`{"podcastId":"${id}"}`))
           },
           sortPodcasts(order){
-              let compareFunction;
+              var compareFunction;
               switch(order){
                 case "dateAdded-asc":compareFunction=(a,b)=>Date.parse(a.CreatedAt)-Date.parse(b.CreatedAt);break;
                 case "dateAdded-desc":compareFunction=(a,b)=>Date.parse(b.CreatedAt)-Date.parse(a.CreatedAt);break;
@@ -298,7 +298,7 @@
               this.podcasts.sort(compareFunction)
           },
           getEpisodeCountTooltip(podcast){
-            let title=`${podcast.DownloadedEpisodesCount} episodes downloaded out of total ${podcast.AllEpisodesCount} episodes`
+            var title=`${podcast.DownloadedEpisodesCount} episodes downloaded out of total ${podcast.AllEpisodesCount} episodes`
             if(podcast.DownloadingEpisodesCount){
                     title+= '\n'+podcast.DownloadingEpisodesCount+' episodes in the queue.'
             
@@ -308,7 +308,7 @@
           getFormattedLastEpisodeDate(podcast){
            const options={month:"short", day:"numeric", year:"numeric"}
            //todo: this is a really dirty hack which needs to be fixed when we work on the episode page
-           let dt=new Date(Date.parse(podcast.LastEpisode.substr(0,10)));
+           var dt=new Date(Date.parse(podcast.LastEpisode.substr(0,10)));
            return dt.toDateString()
           },
           downloadAllEpisodes(id) { downloadAllEpisodes(id);},
diff --git a/client/player.html b/client/player.html
index acba249..77b51e7 100644
--- a/client/player.html
+++ b/client/player.html
@@ -809,7 +809,7 @@ div#large-visualization{
           removeSongTime(songId){
           
           if(localStorage){                              
-            let songTimes=localStorage.songTimes;                 
+            var songTimes=localStorage.songTimes;                 
             if(!songTimes){
                 songTimes={};
             }else{
@@ -825,7 +825,7 @@ div#large-visualization{
           ,saveSongTime(songId,time){
           
             if(localStorage){                              
-              let songTimes=localStorage.songTimes;                 
+              var songTimes=localStorage.songTimes;                 
               if(!songTimes){
                   songTimes={};
               }else{
@@ -840,8 +840,8 @@ div#large-visualization{
           getSavedSongTime(){
            
             if(localStorage){
-              let song=Amplitude.getActiveSongMetadata();  
-              let songTimes=localStorage.songTimes;                 
+              var song=Amplitude.getActiveSongMetadata();  
+              var songTimes=localStorage.songTimes;                 
               if(!songTimes){
                   songTimes={};
               }else{
@@ -855,8 +855,8 @@ div#large-visualization{
             return 0;
           },
           changeSpeed(){
-            let currentSpeedIndex= this.speedOptions.indexOf(this.speed);
-            let nextIndex=0;
+            var currentSpeedIndex= this.speedOptions.indexOf(this.speed);
+            var nextIndex=0;
             if(currentSpeedIndex===-1 || currentSpeedIndex===this.speedOptions.length-1){
                 nextIndex=0;
             }else{
@@ -867,7 +867,7 @@ div#large-visualization{
           },
           getSongsFromItems(items){
             return items.map(x=>{
-                  let toReturn= {
+                  var toReturn= {
                     id:x.ID,
                     name:x.Title,
                     url:x.DownloadPath,
@@ -882,7 +882,7 @@ div#large-visualization{
                 });
           },
           getFormattedLastEpisodeDate(item){
-           let dt=new Date(Date.parse(item.PubDate.substr(0,10)));
+           var dt=new Date(Date.parse(item.PubDate.substr(0,10)));
            return dt.toDateString()
           },
           formatDuration(total) {
@@ -933,7 +933,7 @@ div#large-visualization{
               });
         },
         mounted(){
-          let volume=50;
+          var volume=50;
           if(localStorage?.playerVolume){
             volume=parseInt(localStorage.playerVolume)
           }
@@ -961,7 +961,7 @@ div#large-visualization{
               // },
                 'timeupdate':function(){
                     
-                    let secs=Math.floor(Amplitude.getSongPlayedSeconds());
+                    var secs=Math.floor(Amplitude.getSongPlayedSeconds());
                     if(secs%10===0){
                       song=Amplitude.getActiveSongMetadata();    
                       if(Amplitude.getSongPlayedPercentage()>20){
@@ -1025,7 +1025,7 @@ div#large-visualization{
        
 
 
-let songElements = document.getElementsByClassName('song');
+var songElements = document.getElementsByClassName('song');
 
 for( var i = 0; i < songElements.length; i++ ){
 	songElements[i].addEventListener('click', function(){
@@ -1033,11 +1033,11 @@ for( var i = 0; i < songElements.length; i++ ){
 	});
 }
 
-let markedAsPlayed=[];
+var markedAsPlayed=[];
 
 
 function markSongAsPlayed(id) {
-        let endpoint = "markPlayed";
+        var endpoint = "markPlayed";
         if(markedAsPlayed.indexOf(id)!==-1){
           return;
         }