diff --git a/packages/ui-default/entry.js b/packages/ui-default/entry.js
index 745793ea9..bafbe8f18 100644
--- a/packages/ui-default/entry.js
+++ b/packages/ui-default/entry.js
@@ -27,9 +27,11 @@ console.log(
 `,
 );
 
+window.UiContext = JSON.parse(window.UiContext);
 if ('serviceWorker' in navigator) {
   window.addEventListener('load', () => {
-    navigator.serviceWorker.register('/service-worker.js').then((registration) => {
+    const encodedConfig = encodeURIComponent(JSON.stringify(UiContext.SWConfig));
+    navigator.serviceWorker.register(`/service-worker.js?config=${encodedConfig}`).then((registration) => {
       console.log('SW registered: ', registration);
     }).catch((registrationError) => {
       console.log('SW registration failed: ', registrationError);
@@ -38,8 +40,6 @@ if ('serviceWorker' in navigator) {
 }
 
 document.addEventListener('DOMContentLoaded', async () => {
-  window.UiContext = JSON.parse(window.UiContext);
-
   const PageLoader = '<div class="page-loader nojs--hide" style="display:none;"><div class="loader"></div></div>';
   $('body').prepend(PageLoader);
   $('.page-loader').fadeIn(500);
diff --git a/packages/ui-default/index.ts b/packages/ui-default/index.ts
index 3bfad9965..89c006f6d 100644
--- a/packages/ui-default/index.ts
+++ b/packages/ui-default/index.ts
@@ -78,24 +78,6 @@ class MarkdownHandler extends Handler {
   }
 }
 
-class SWConfigHandler extends Handler {
-  noCheckPermView = true;
-
-  async get() {
-    this.response.addHeader('Cache-Control', 'public, max-age=86400');
-    this.response.body = {
-      preload: SystemModel.get('ui-default.preload'),
-      hosts: [
-        `http://${this.request.host}`,
-        `https://${this.request.host}`,
-        SystemModel.get('server.url'),
-        SystemModel.get('server.cdn'),
-      ],
-      domains: SystemModel.get('ui-default.domains') || [],
-    };
-  }
-}
-
 class SystemConfigSchemaHandler extends Handler {
   async get() {
     const schema = convert(Schema.intersect(SystemSettings) as any, true);
@@ -162,7 +144,6 @@ export function apply(ctx: Context) {
   ctx.Route('set_legacy', '/legacy', LegacyModeHandler);
   ctx.Route('markdown', '/markdown', MarkdownHandler);
   ctx.Route('config_schema', '/manage/config/schema.json', SystemConfigSchemaHandler, PRIV.PRIV_EDIT_SYSTEM);
-  ctx.Route('sw_config', '/sw-config', SWConfigHandler);
   ctx.Route('media', '/media', RichMediaHandler);
   ctx.plugin(require('./backendlib/builder'));
   ctx.on('handler/after/DiscussionRaw', async (that) => {
@@ -171,4 +152,16 @@ export function apply(ctx: Context) {
       that.response.body = await markdown.render(that.response.body);
     }
   });
+  ctx.on('handler/after', async (that) => {
+    that.UiContext.SWConfig = {
+      preload: SystemModel.get('ui-default.preload'),
+      hosts: [
+        `http://${that.request.host}`,
+        `https://${that.request.host}`,
+        SystemModel.get('server.url'),
+        SystemModel.get('server.cdn'),
+      ],
+      domains: SystemModel.get('ui-default.domains') || [],
+    };
+  });
 }
diff --git a/packages/ui-default/package.json b/packages/ui-default/package.json
index dc0de41ab..e9c83737a 100644
--- a/packages/ui-default/package.json
+++ b/packages/ui-default/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hydrooj/ui-default",
-  "version": "4.47.0",
+  "version": "4.47.1",
   "author": "undefined <i@undefined.moe>",
   "license": "AGPL-3.0",
   "main": "index.ts",
diff --git a/packages/ui-default/service-worker.ts b/packages/ui-default/service-worker.ts
index 2b99daad1..3b625d852 100644
--- a/packages/ui-default/service-worker.ts
+++ b/packages/ui-default/service-worker.ts
@@ -49,20 +49,20 @@ interface ServiceWorkerConfig {
 }
 let config: ServiceWorkerConfig = null;
 
-async function initConfig() {
-  const res = await fetch('/sw-config');
-  config = await res.json();
+function initConfig() {
+  config = JSON.parse(new URL(location).searchParams.get('config'));
   config.hosts ||= [];
   if (!config.domains?.length) config.domains = [location.host];
+  console.log('Config:', config);
 }
 
 self.addEventListener('install', (event) => event.waitUntil((async () => {
-  const [cache, manifest] = await Promise.all([
-    caches.open(PRECACHE),
-    fetch('/manifest.json').then((res) => res.json()),
-    initConfig(),
-  ]);
+  initConfig();
   if (process.env.NODE_ENV === 'production' && config?.preload) {
+    const [cache, manifest] = await Promise.all([
+      caches.open(PRECACHE),
+      fetch('/manifest.json').then((res) => res.json()),
+    ]);
     const files = Object.values(manifest).filter(shouldPreCache)
       .map((i: string) => new URL(i, config.preload).toString());
     await cache.addAll(files); // NOTE: CORS header
@@ -72,12 +72,9 @@ self.addEventListener('install', (event) => event.waitUntil((async () => {
 
 self.addEventListener('activate', (event) => {
   const valid = [PRECACHE];
+  initConfig();
   event.waitUntil((async () => {
-    const [names] = await Promise.all([
-      caches.keys(),
-      initConfig(),
-    ]);
-    console.log('Config: ', config);
+    const names = await caches.keys();
     await Promise.all(names.filter((name) => !valid.includes(name)).map((p) => caches.delete(p)));
     self.clients.claim();
   })());
@@ -94,6 +91,7 @@ async function get(request: Request) {
         method: request.method,
         credentials: isResource ? 'same-origin' : 'include',
         headers: request.headers,
+        body: request.body,
       });
       if (r.ok) {
         console.log('Load success from ', source.toString());