diff --git a/js/base.js b/js/base.js
index 5225d505..2c635d2d 100644
--- a/js/base.js
+++ b/js/base.js
@@ -207,8 +207,8 @@ function addAnchorLinks() {
 /* Start dark mode toggler */
 function toggleDarkMode() { 
 
-  const toggleSwitch = document.querySelector('.dark-theme-toggle input[type="checkbox"]');
-  const currentTheme = localStorage.getItem('theme');
+  var toggleSwitch = document.querySelector('.dark-theme-toggle input[type="checkbox"]');
+  var currentTheme = localStorage.getItem('theme');
 
   if (currentTheme) {
     document.documentElement.setAttribute('data-theme', currentTheme);