diff --git a/templates/contestpage.html b/templates/contestpage.html
index 088419f..83cfc44 100755
--- a/templates/contestpage.html
+++ b/templates/contestpage.html
@@ -8,15 +8,15 @@
 <script type="text/javascript">
   
   var timeleft = {{ time }}; 
-  var counter = 0
-  var startTime = 0;
-  var currentTime = 0;
+  let counter = 0
+  let startTime = 0;
+  let currentTime = 0;
 
   console.log(timeleft)
 
   function convertSeconds(s) {
-    var min = floor(s / 60);
-    var sec = s % 60;
+    let min = floor(s / 60);
+    let sec = s % 60;
     return nf(min, 2) + ':' + nf(sec, 2);
   }
 
diff --git a/templates/home.html b/templates/home.html
index 8b750e1..ac45f77 100755
--- a/templates/home.html
+++ b/templates/home.html
@@ -8,14 +8,14 @@
 <script>
 function check(form) 
 	{
-    var str = form.contestcode.value;
+    let str = form.contestcode.value;
     str = str.toUpperCase();
     //alert(str);
-    var coderegex = /^COOK[0-9][0-9](A|B)?$/;
+    let coderegex = /^COOK[0-9][0-9](A|B)?$/;
     Result = coderegex.test(str);
     
-    var flag = 0;
-    var len = str.length;
+    let flag = 0;
+    let len = str.length;
     //alert(Result);
     //alert(len);
     if(Result == true)
@@ -23,7 +23,7 @@
     	res = str.match(/\d+/g).map(Number);
         if(res > 91 && res < 99)
         {
-        	var pp = str.slice(-1);
+        	let pp = str.slice(-1);
         	if(pp == 'A' || pp == 'B')
             {
             	if(len == 7)
diff --git a/templates/timer.html b/templates/timer.html
index 4f87949..338af61 100755
--- a/templates/timer.html
+++ b/templates/timer.html
@@ -16,8 +16,8 @@
 	var currentTime = 0;
 
 	function convertSeconds(s) {
-	  var min = floor(s / 60);
-	  var sec = s % 60;
+	  let min = floor(s / 60);
+	  let sec = s % 60;
 	  return nf(min, 2) + ':' + nf(sec, 2);
 	}
 
@@ -28,10 +28,10 @@
 	// }
 
 	function setup() {
-		var timer  = select('#timer')
+		let timer  = select('#timer')
 		// startTime = millis();
 		if(timeleft<0){
-			timer.html(The contest has ended)
+			timer.html("The contest has ended")
 		}
 		else{
 			timer.html(timeleft - counter)
@@ -42,7 +42,7 @@
 		 //    	timeleft = min * 60;
 		 //  	}
 
-		  	var timer = select('#timer');
+		  	let timer = select('#timer');
 		  	timer.html(convertSeconds(timeleft - currentTime));
 
 		  	// var interval = setInterval(timeIt, 1000);