diff --git a/offline/offline.web.ts b/offline/offline.web.ts
index 0dcb6b4793..35d55b873a 100644
--- a/offline/offline.web.ts
+++ b/offline/offline.web.ts
@@ -32,7 +32,7 @@ namespace $ {
 		async respond(request: Request) {
 			let fallback_header
 
-			const force_cache = /.+\/[^\/]+\.html/.test(request.url)
+			const force_cache = /.+\/index\.html/.test(request.url)
 			const no_cache = request.cache === 'no-cache' && ! force_cache
 			const ignore_cache = this.value('ignore_cache')
 
diff --git a/worker/service/plugin.ts b/worker/service/plugin.ts
index 162bd58cbc..735e58d88b 100644
--- a/worker/service/plugin.ts
+++ b/worker/service/plugin.ts
@@ -3,7 +3,7 @@ namespace $ {
 	export class $mol_worker_service_plugin extends $mol_object {
 		static attach_to< This extends typeof $mol_worker_service_plugin >(
 			this : This,
-			worker = $mol_worker_service,
+			worker: { attach(plugin: $mol_worker_service_plugin): void },
 			config?: Partial< InstanceType< This > >,
 		) {
 			const plugin = new this