diff --git a/src/service-worker.ts b/src/service-worker.ts
index 0927424..61757f3 100644
--- a/src/service-worker.ts
+++ b/src/service-worker.ts
@@ -16,7 +16,9 @@ sw.addEventListener('install', (event) => {
 	event.waitUntil(
 		caches
 			.open(CACHE)
-			.then((c) => c.addAll(ASSETS))
+			// Bypass the HTTP cache: hashed assets are cached as immutable, so a bad
+			// response (e.g. a wrong MIME type) would otherwise be copied in forever.
+			.then((c) => c.addAll(ASSETS.map((url) => new Request(url, { cache: 'reload' }))))
 			.then(() => sw.skipWaiting())
 	);
 });