diff --git a/src/light-mode.js b/src/light-mode.js
index 661ef29..77fd86f 100644
--- a/src/light-mode.js
+++ b/src/light-mode.js
@@ -1,6 +1,6 @@
 (function () {
-    var element = document.body;
-    var theme = localStorage.getItem("colorscheme");
+    let element = document.body;
+    let theme = localStorage.getItem("colorscheme");
     if (theme === null) {
         localStorage.setItem("colorscheme", "dark")
     }
@@ -10,8 +10,8 @@
 })();
 
 function themeToggle() {
-    var theme = localStorage.getItem("colorscheme");
-    var element = document.body;
+    let theme = localStorage.getItem("colorscheme");
+    let element = document.body;
     if (theme === "dark") {
         element.classList.toggle("light-mode");
         localStorage.setItem("colorscheme", "light")