diff --git a/app.js b/app.js
index 664e1984..87da26e8 100644
--- a/app.js
+++ b/app.js
@@ -297,7 +297,7 @@ addWhatappEventHandler();
 }
 
 // service worker
-/*
+
 if('serviceWorker' in navigator){
     window.addEventListener('load', () => {
     navigator.serviceWorker.register('/sw.js')
@@ -307,5 +307,5 @@ if('serviceWorker' in navigator){
         .catch((err)=> console.log('Service worker not registered', err));
   });
         
-}*/
+}
 
diff --git a/sw.js b/sw.js
index cfe7757b..694e2935 100644
--- a/sw.js
+++ b/sw.js
@@ -1,7 +1,7 @@
 // #5
 
-const staticCacheName = 'site-static-v51';
-const dynamicCache = 'site-dynamic-v51';
+const staticCacheName = 'site-static-v52';
+const dynamicCache = 'site-dynamic-v52';
 
 const dynamicCacheSize = 30;