diff --git a/service-worker.js b/service-worker.js
index a39648c..98a077b 100644
--- a/service-worker.js
+++ b/service-worker.js
@@ -33,7 +33,7 @@ const urlsToCache = [
   '/.htaccess.txt'
 ];
 
-const CURRENT_VERSION = 'v20';
+const CURRENT_VERSION = 'v21';
 
 // Install event - cache files
 self.addEventListener('install', event => {