diff --git a/static/js/script.js b/static/js/script.js
index a897f77..e414e35 100644
--- a/static/js/script.js
+++ b/static/js/script.js
@@ -32,7 +32,7 @@ function load() {
   // Initial setting of the preffered system setting
   function initialization(){
     const initUseDark = getStoredUseDark();
-    if (initUseDark != true && initUseDark != false){
+    if (initUseDark == undefined ){
       toggleDarkMode(useDark.matches);
     }else{
       toggleDarkMode(initUseDark);