diff --git a/404.html b/404.html
index 91eaac7..c85f4cc 100644
--- a/404.html
+++ b/404.html
@@ -50,6 +50,7 @@
     <svg></svg>
     <p class="output">Please try to <a href="javascript:history.back()">go back</a> or <a href="/">return to the homepage</a>.</p>
     
+    <script src="/JAVASCRIPT/darkmode-js.min.js"></script>
     <script>
         const darkmode = new Darkmode(options);
         darkmode.showWidget();