diff --git a/config-example.json b/config-example.json
index edf2043..7810d6a 100644
--- a/config-example.json
+++ b/config-example.json
@@ -71,18 +71,27 @@
     "cpp17",
     "csharp",
     "c",
-    "vala",
     "java",
     "pascal",
-    "lua",
-    "luajit",
     "python2",
     "python3",
     "nodejs",
     "ruby",
-    "haskell",
-    "ocaml",
-    "vbnet"
+    "haskell"
+  ],
+  "filter_enabled_languages": [
+    "cpp",
+    "cpp11",
+    "cpp17",
+    "csharp",
+    "c",
+    "java",
+    "pascal",
+    "python2",
+    "python3",
+    "nodejs",
+    "ruby",
+    "haskell"
   ],
   "links": [
     {
diff --git a/modules/problem.js b/modules/problem.js
index 6a01cf3..8b46c72 100644
--- a/modules/problem.js
+++ b/modules/problem.js
@@ -592,7 +592,7 @@ app.post('/problem/:id/submit', app.multer.fields([{ name: 'answer', maxCount: 1
     const curUser = res.locals.user;
 
     if (!problem) throw new ErrorMessage('无此题目。');
-    if (problem.type !== 'submit-answer' && !syzoj.languages[req.body.language]) throw new ErrorMessage('不支持该语言。');
+    if (problem.type !== 'submit-answer' && !syzoj.config.enabled_languages.includes(req.body.language)) throw new ErrorMessage('不支持该语言。');
     if (!curUser) throw new ErrorMessage('请登录后继续。', { '登录': syzoj.utils.makeUrl(['login'], { 'url': syzoj.utils.makeUrl(['problem', id]) }) });
 
     let judge_state;
diff --git a/views/admin_rejudge.ejs b/views/admin_rejudge.ejs
index d1b6cf2..4e68204 100644
--- a/views/admin_rejudge.ejs
+++ b/views/admin_rejudge.ejs
@@ -19,7 +19,7 @@
         <div class="menu">
           <div class="item" data-value="">不限</div>
           <div class="item" data-value="submit-answer">提交答案</div>
-          <% for (let lang of syzoj.config.enabled_languages) { %>
+          <% for (let lang of syzoj.config.filter_enabled_languages) { %>
             <div class="item" data-value="<%= lang %>"><%= syzoj.languages[lang].show %></div>
           <% } %>
         </div>
diff --git a/views/submissions.ejs b/views/submissions.ejs
index f9fae7d..8b2dc7b 100644
--- a/views/submissions.ejs
+++ b/views/submissions.ejs
@@ -38,7 +38,7 @@
           <div class="menu">
             <div class="item" data-value=""><b>不限</b></div>
             <div class="item" data-value="submit-answer"><b>提交答案</b></div>
-            <% for (let lang of syzoj.config.enabled_languages) { %>
+            <% for (let lang of syzoj.config.filter_enabled_languages) { %>
               <div class="item" data-value="<%= lang %>"><b><%= syzoj.languages[lang].show %></b></div>
             <% } %>
           </div>