diff --git a/utils.js b/utils.js
index b3b285e429..6593780220 100644
--- a/utils.js
+++ b/utils.js
@@ -191,19 +191,25 @@ window.addEventListener('offline', () => { isOffline = true });
 
 let isPersistStorage = false;
 
-if (navigator.storage && navigator.storage.persist) {
+async function checkPersistStorage() {
   
-  isPersistStorage = await navigator.storage.persisted();
-  
-  if (!isPersistStorage) {
-    
-    // request persistent storage
-    isPersistStorage = await navigator.storage.persist();
-    
+  if (navigator.storage && navigator.storage.persist) {
+
+    isPersistStorage = await navigator.storage.persisted();
+
+    if (!isPersistStorage) {
+
+      // request persistent storage
+      isPersistStorage = await navigator.storage.persist();
+
+    }
+
   }
   
 }
 
+checkPersistStorage();
+
 
 // base64 encode/decode
 
diff --git a/worker/client-channel.js b/worker/client-channel.js
index 4c479e9811..1c0b0f256d 100644
--- a/worker/client-channel.js
+++ b/worker/client-channel.js
@@ -4,7 +4,7 @@
 
 
 // update worker name when updating worker
-const WORKER_NAME = 'codeit-worker-v492';
+const WORKER_NAME = 'codeit-worker-v493';
 
 
 // internal paths