diff --git a/ghost/admin/app/controllers/application.js b/ghost/admin/app/controllers/application.js
index c014d571aa0c..6c15e2840db4 100644
--- a/ghost/admin/app/controllers/application.js
+++ b/ghost/admin/app/controllers/application.js
@@ -27,6 +27,10 @@ export default class ApplicationController extends Controller {
         return this.config.clientExtensions?.script;
     }
 
+    get cacheBuster() {
+        return Date.now();
+    }
+
     get showNavMenu() {
         let {router, session, ui} = this;
 
diff --git a/ghost/admin/app/templates/application.hbs b/ghost/admin/app/templates/application.hbs
index fe955babf141..dbc514172e55 100644
--- a/ghost/admin/app/templates/application.hbs
+++ b/ghost/admin/app/templates/application.hbs
@@ -40,7 +40,7 @@
     {{#if this.showScriptExtension}}
         {{{this.showScriptExtension.container}}}
         {{!-- template-lint-disable no-forbidden-elements --}}
-        <script src="{{this.showScriptExtension.src}}"></script>
+        <script src="{{this.showScriptExtension.src}}?v={{this.cacheBuster}}"></script>
     {{/if}}
 
     {{#if this.settings.accentColor}}