diff --git a/build/prepare.js b/build/prepare.js
index 7bd65e12c..9cfb1e292 100644
--- a/build/prepare.js
+++ b/build/prepare.js
@@ -69,6 +69,7 @@ const UIConfig = {
     ],
     compilerOptions: {
         experimentalDecorators: true,
+        esModuleInterop: true,
         resolveJsonModule: true,
         jsx: 'react',
         module: 'commonjs',
diff --git a/packages/hydrooj/package.json b/packages/hydrooj/package.json
index e8abe9046..77792931b 100644
--- a/packages/hydrooj/package.json
+++ b/packages/hydrooj/package.json
@@ -1,6 +1,6 @@
 {
     "name": "hydrooj",
-    "version": "4.0.0",
+    "version": "4.0.1",
     "bin": "bin/hydrooj.js",
     "main": "src/plugin-api",
     "module": "src/plugin-api",
diff --git a/packages/hydrooj/src/entry/common.ts b/packages/hydrooj/src/entry/common.ts
index 26ffec9ab..37ec6e068 100644
--- a/packages/hydrooj/src/entry/common.ts
+++ b/packages/hydrooj/src/entry/common.ts
@@ -59,9 +59,10 @@ export const service = getLoader('service', 'service');
 
 export async function builtinModel(ctx: Context) {
     const modelDir = path.resolve(__dirname, '..', 'model');
-    const models = ['task', 'blacklist', 'discussion', 'document'];
+    const models = await fs.readdir(modelDir);
     for (const t of models) {
-        ctx.loader.reloadPlugin(ctx, path.resolve(modelDir, t), {}, `hydrooj/model/${t}`);
+        const q = path.resolve(modelDir, t);
+        if ('apply' in require(q)) ctx.loader.reloadPlugin(ctx, q, {}, `hydrooj/model/${t.split('.')[0]}`);
     }
 }
 
diff --git a/packages/hydrooj/src/entry/worker.ts b/packages/hydrooj/src/entry/worker.ts
index f3affce7b..f14c3051d 100644
--- a/packages/hydrooj/src/entry/worker.ts
+++ b/packages/hydrooj/src/entry/worker.ts
@@ -7,6 +7,7 @@ import fs from 'fs-extra';
 import { Context } from '../context';
 import { Logger } from '../logger';
 import db from '../service/db';
+import { sleep } from '../utils';
 import {
     addon, builtinModel, handler, lib, locale, model,
     script, service, setting, template,
@@ -67,6 +68,7 @@ export async function apply(ctx: Context) {
     await ctx.lifecycle.flush();
     await script(pending, fail, ctx);
     await ctx.lifecycle.flush();
+    await sleep(1000); // lifecycle.flush won't wait for async function
     await ctx.parallel('app/started');
     if (process.env.NODE_APP_INSTANCE === '0') {
         const scripts = require('../upgrade').default;
diff --git a/packages/hydrooj/src/model/index.ts b/packages/hydrooj/src/model/index.ts
deleted file mode 100644
index 48485fe3f..000000000
--- a/packages/hydrooj/src/model/index.ts
+++ /dev/null
@@ -1,19 +0,0 @@
-import './builtin';
-import './document';
-import './domain';
-import './blacklist';
-import './opcount';
-import './setting';
-import './token';
-import './user';
-import './storage';
-import './problem';
-import './record';
-import './contest';
-import './message';
-import './solution';
-import './training';
-import './discussion';
-import './system';
-import './oplog';
-import './blog';
diff --git a/packages/hydrooj/src/model/setting.ts b/packages/hydrooj/src/model/setting.ts
index 9aef9f357..0d3fa1253 100644
--- a/packages/hydrooj/src/model/setting.ts
+++ b/packages/hydrooj/src/model/setting.ts
@@ -3,11 +3,11 @@
 import yaml from 'js-yaml';
 import { Dictionary } from 'lodash';
 import moment from 'moment-timezone';
-import { parseLang } from '@hydrooj/utils/lib/lang';
+import { LangConfig, parseLang } from '@hydrooj/utils/lib/lang';
 import { retry } from '@hydrooj/utils/lib/utils';
+import { Context } from '../context';
 import { Setting as _Setting } from '../interface';
 import { Logger } from '../logger';
-import * as bus from '../service/bus';
 import * as builtin from './builtin';
 
 type SettingDict = Dictionary<_Setting>;
@@ -238,9 +238,9 @@ SystemSetting(
 );
 
 // eslint-disable-next-line import/no-mutable-exports
-export let langs = {};
+export const langs: Record<string, LangConfig> = {};
 
-bus.on('app/started', async () => {
+export async function apply(ctx: Context) {
     logger.debug('Ensuring settings');
     const system = global.Hydro.model.system;
     for (const setting of SYSTEM_SETTINGS) {
@@ -252,27 +252,26 @@ bus.on('app/started', async () => {
         }
     }
     try {
-        langs = parseLang(system.get('hydrooj.langs'));
-        global.Hydro.model.setting.langs = langs;
+        Object.assign(langs, parseLang(system.get('hydrooj.langs')));
         const range = {};
         for (const key in langs) range[key] = langs[key].display;
         LangSettingNode.range = range;
         ServerLangSettingNode.range = range;
     } catch (e) { /* Ignore */ }
-});
-
-bus.on('system/setting', (args) => {
-    if (args.hydrooj?.langs) {
-        langs = parseLang(args.hydrooj.langs);
-        global.Hydro.model.setting.langs = langs;
-        const range = {};
-        for (const key in langs) range[key] = langs[key].display;
-        LangSettingNode.range = range;
-        ServerLangSettingNode.range = range;
-    }
-});
+    console.log('l', langs?.cc);
+    ctx.on('system/setting', (args) => {
+        if (args.hydrooj?.langs) {
+            Object.assign(langs, parseLang(args.hydrooj.langs));
+            const range = {};
+            for (const key in langs) range[key] = langs[key].display;
+            LangSettingNode.range = range;
+            ServerLangSettingNode.range = range;
+        }
+    });
+}
 
 global.Hydro.model.setting = {
+    apply,
     Setting,
     PreferenceSetting,
     AccountSetting,
diff --git a/packages/ui-default/index.ts b/packages/ui-default/index.ts
index 81aa0b997..308740f9b 100644
--- a/packages/ui-default/index.ts
+++ b/packages/ui-default/index.ts
@@ -60,6 +60,7 @@ export async function buildUI() {
   if (build.errors.length) console.error(build.errors);
   if (build.warnings.length) console.warn(build.warnings);
   const pages = build.outputFiles.map((i) => i.text);
+  console.log('ui', SettingModel, JSON.stringify(SettingModel.langs));
   const payload = [`window.LANGS=${JSON.stringify(SettingModel.langs)};`, ...pages];
 
   const c = crypto.createHash('sha1');
@@ -230,14 +231,13 @@ export function apply(ctx) {
   ctx.Route('media', '/media', RichMediaHandler);
   ctx.on('app/started', buildUI);
   ctx.on('app/started', updateLogo);
-  ctx.on('system/setting', updateLogo);
   const debouncedBuildUI = debounce(buildUI, 1000);
-  const triggerHotUpdate = (path) => {
-    if (!path.includes('/ui-default/') && !path.includes('/public/')) return;
+  const triggerHotUpdate = (path?: string) => {
+    if (path && !path.includes('/ui-default/') && !path.includes('/public/')) return;
     debouncedBuildUI();
+    updateLogo();
   };
+  ctx.on('system/setting', triggerHotUpdate);
   ctx.on('app/watch/change', triggerHotUpdate);
   ctx.on('app/watch/unlink', triggerHotUpdate);
-  buildUI();
-  updateLogo();
 }
diff --git a/packages/ui-default/package.json b/packages/ui-default/package.json
index b1cae5b32..e43885efb 100644
--- a/packages/ui-default/package.json
+++ b/packages/ui-default/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hydrooj/ui-default",
-  "version": "4.41.1",
+  "version": "4.41.2",
   "author": "undefined <i@undefined.moe>",
   "license": "AGPL-3.0",
   "main": "index.ts",