diff --git a/packages/hydrooj/src/model/problem.ts b/packages/hydrooj/src/model/problem.ts
index 6ba8c9137..7c85fe45e 100644
--- a/packages/hydrooj/src/model/problem.ts
+++ b/packages/hydrooj/src/model/problem.ts
@@ -3,7 +3,6 @@ import { ObjectID, FilterQuery } from 'mongodb';
 import { Dictionary, escapeRegExp, pick } from 'lodash';
 import { STATUS } from './builtin';
 import * as document from './document';
-import domain from './domain';
 import { buildProjection } from '../utils';
 import type { ProblemStatusDoc, Pdict, Document } from '../interface';
 import {
diff --git a/packages/ui-default/build/config/webpack.js b/packages/ui-default/build/config/webpack.js
index 54792c171..58e7e5adf 100644
--- a/packages/ui-default/build/config/webpack.js
+++ b/packages/ui-default/build/config/webpack.js
@@ -143,6 +143,7 @@ export default function (env = {}) {
         patterns: [
           { from: root('static') },
           { from: root(`${dirname(require.resolve('emojify.js/package.json'))}/dist/images/basic`), to: 'img/emoji/' },
+          { from: root(`${dirname(require.resolve('vditor/package.json'))}`), to: 'vditor' },
         ],
       }),
       new webpack.DefinePlugin({
diff --git a/packages/ui-default/components/cmeditor/index.js b/packages/ui-default/components/cmeditor/index.js
index f72990acc..b9cc0cd8a 100644
--- a/packages/ui-default/components/cmeditor/index.js
+++ b/packages/ui-default/components/cmeditor/index.js
@@ -13,6 +13,7 @@ export const config = {
   toolbarConfig: {
     pin: true,
   },
+  cdn: `${UiContext.cdn_prefix}vditor`,
   counter: {
     enable: true,
     max: 65536,