diff --git a/offline/offline.web.ts b/offline/offline.web.ts
index 2b1d160cc4..505da74bba 100644
--- a/offline/offline.web.ts
+++ b/offline/offline.web.ts
@@ -49,6 +49,17 @@ namespace $ {
 				
 				const fetch_data = () => fetch( request ).then( response => {
 					if (response.status !== 200) return response
+					
+					const headers = new Headers( response.headers )
+					headers.set( "Cross-Origin-Embedder-Policy", "credentialless" )
+					headers.set( "Cross-Origin-Opener-Policy", "same-origin" )
+					
+					response = new Response( response.body, {
+						status: response.status,
+						statusText: response.statusText,
+						headers,
+					});				
+					
 					event.waitUntil(
 						caches.open( '$mol_offline' ).then(
 							cache => cache.put( request , response )