diff --git a/lib/assets/javascripts/color_mode_picker.js b/lib/assets/javascripts/color_mode_picker.js
index b6e6ab21..b3ce96ce 100644
--- a/lib/assets/javascripts/color_mode_picker.js
+++ b/lib/assets/javascripts/color_mode_picker.js
@@ -5,10 +5,15 @@
  * Taken from https://getbootstrap.com/docs/5.3/customize/color-modes/#javascript
  */
 
-const getStoredTheme = () => localStorage.getItem('theme')
-const setStoredTheme = theme => localStorage.setItem('theme', theme)
+function getStoredTheme(){
+    return localStorage.getItem('theme')
+}
 
-const getPreferredTheme = () => {
+function setStoredTheme(theme) {
+    localStorage.setItem('theme', theme)
+}
+
+function getPreferredTheme() {
     const storedTheme = getStoredTheme()
     if (storedTheme) {
         return storedTheme
@@ -17,7 +22,7 @@ const getPreferredTheme = () => {
     return window.matchMedia('(prefers-color-scheme: dark)').matches ? 'dark' : 'light'
 }
 
-const setTheme = theme => {
+function setTheme(theme) {
     let currentTheme = theme || 'auto';
     if (theme === 'auto') {
         if (window.matchMedia('(prefers-color-scheme: dark)').matches) {
@@ -44,7 +49,7 @@ window.getCurrentTheme = () => {
     return document.documentElement.getAttribute('data-bs-theme') || setTheme(getPreferredTheme());
 }
 
-const showActiveTheme = (theme, focus = false) => {
+function showActiveTheme(theme, focus = false) {
     const themeSwitcher = document.querySelector('#bd-theme')
 
     if (!themeSwitcher) {