diff --git a/packages/hydrooj/src/handler/contest.ts b/packages/hydrooj/src/handler/contest.ts
index 780df36b8..fa784f894 100644
--- a/packages/hydrooj/src/handler/contest.ts
+++ b/packages/hydrooj/src/handler/contest.ts
@@ -18,7 +18,7 @@ import record from '../model/record';
 import user from '../model/user';
 import message from '../model/message';
 import {
-    Route, Handler, Types, param, query,
+    Route, Handler, Types, param,
 } from '../service/server';
 import * as bus from '../service/bus';
 import storage from '../service/storage';
diff --git a/packages/hydrooj/src/handler/homework.ts b/packages/hydrooj/src/handler/homework.ts
index e5eb96b58..713113492 100644
--- a/packages/hydrooj/src/handler/homework.ts
+++ b/packages/hydrooj/src/handler/homework.ts
@@ -11,7 +11,7 @@ import {
     PenaltyRules, Tdoc, ProblemDoc, User,
 } from '../interface';
 import {
-    Route, Handler, Types, param, query,
+    Route, Handler, Types, param,
 } from '../service/server';
 import * as bus from '../service/bus';
 import domain from '../model/domain';
diff --git a/packages/hydrooj/src/model/record.ts b/packages/hydrooj/src/model/record.ts
index 092f6b777..42aa67461 100644
--- a/packages/hydrooj/src/model/record.ts
+++ b/packages/hydrooj/src/model/record.ts
@@ -66,7 +66,7 @@ class RecordModel {
         let data: FileInfo[] = [];
         if (rdoc.pid) {
             const pdoc = await problem.get(rdoc.pdomain, rdoc.pid);
-            if (!pdoc) throw new ProblemNotFoundError(rdoc?.pdomain, rdoc.pid);
+            if (!pdoc) throw new ProblemNotFoundError(rdoc.pdomain, rdoc.pid);
             data = pdoc.data;
             if (typeof pdoc.config === 'string') throw new Error(pdoc.config);
             if (pdoc.config.type === 'remote_judge') {
diff --git a/packages/ui-default/components/objective-question/index.jsx b/packages/ui-default/components/objective-question/index.jsx
index 40fb4be6e..8a81c97c7 100644
--- a/packages/ui-default/components/objective-question/index.jsx
+++ b/packages/ui-default/components/objective-question/index.jsx
@@ -67,7 +67,7 @@ export default class ObjectiveContainer extends React.PureComponent {
     return (
       <form onSubmit={this.onSubmit}>
         {this.props.panel.map((i, name) => (
-          <div className="row">
+          <div className="row" key={i}>
             <div className="medium-7 columns form__item end">
               {i.choices ? this.Radio(i, name) : this.Textbox(i, name)}
             </div>
diff --git a/packages/ui-default/package.json b/packages/ui-default/package.json
index 008b0de0b..14fb729c7 100644
--- a/packages/ui-default/package.json
+++ b/packages/ui-default/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hydrooj/ui-default",
-  "version": "4.17.0",
+  "version": "4.17.1",
   "author": "undefined <i@undefined.moe>",
   "license": "AGPL-3.0",
   "main": "hydro.js",
diff --git a/packages/ui-default/pages/home_preference.page.jsx b/packages/ui-default/pages/home_preference.page.jsx
index a0286d352..588da2b72 100644
--- a/packages/ui-default/pages/home_preference.page.jsx
+++ b/packages/ui-default/pages/home_preference.page.jsx
@@ -18,9 +18,7 @@ const page = new NamedPage('home_preference', async () => {
         super(props);
         this.state = { value: UserContext.astyleOptions };
         [this.success, this.preview] = format(code, `${this.state.value.trim()} mode=c`);
-        this.state.highlight = this.success
-          ? prismjs.highlight(this.preview, prismjs.Prism.languages.cpp, 'C++')
-          : prismjs.highlight(this.preview, prismjs.Prism.languages.cpp, 'C++');
+        this.state.highlight = prismjs.highlight(this.preview, prismjs.Prism.languages.cpp, 'C++');
       }
 
       render() {
@@ -39,9 +37,7 @@ const page = new NamedPage('home_preference', async () => {
                     onChange={(ev) => {
                       ev.stopPropagation();
                       [this.success, this.preview] = format(code, `${ev.target.value.trim()} mode=c`);
-                      const highlight = this.success
-                        ? prismjs.highlight(this.preview, prismjs.Prism.languages.cpp, 'C++')
-                        : prismjs.highlight(this.preview, prismjs.Prism.languages.cpp, 'C++');
+                      const highlight = prismjs.highlight(this.preview, prismjs.Prism.languages.cpp, 'C++');
                       this.setState({ value: ev.target.value, highlight });
                     }}
                     className="textbox"
diff --git a/packages/ui-default/templates/contest_boardcast.html b/packages/ui-default/templates/contest_broadcast.html
similarity index 100%
rename from packages/ui-default/templates/contest_boardcast.html
rename to packages/ui-default/templates/contest_broadcast.html