diff --git a/packages/hydrooj/package.json b/packages/hydrooj/package.json
index 62bb99f3f..b42b85932 100644
--- a/packages/hydrooj/package.json
+++ b/packages/hydrooj/package.json
@@ -1,6 +1,6 @@
 {
     "name": "hydrooj",
-    "version": "2.28.31",
+    "version": "2.28.32",
     "bin": "bin/hydrooj.js",
     "main": "dist/loader.js",
     "typings": "dist/loader.d.ts",
diff --git a/packages/hydrooj/src/handler/import.ts b/packages/hydrooj/src/handler/import.ts
index f321d224a..82216fed5 100644
--- a/packages/hydrooj/src/handler/import.ts
+++ b/packages/hydrooj/src/handler/import.ts
@@ -13,7 +13,7 @@ import { Logger } from '../logger';
 import type { ContentNode } from '../interface';
 import problem, { ProblemDoc } from '../model/problem';
 import TaskModel from '../model/task';
-import { PERM } from '../model/builtin';
+import { PERM, PRIV } from '../model/builtin';
 import {
     Route, Handler, Types, post,
 } from '../service/server';
@@ -279,7 +279,8 @@ class ProblemImportHydroHandler extends Handler {
         this.response.template = 'problem_import.html';
     }
 
-    async post({ domainId }) {
+    async post({ domainId, keepUser }) {
+        if (keepUser) this.checkPriv(PRIV.PRIV_EDIT_SYSTEM);
         if (!this.request.files.file) throw new ValidationError('file');
         const tmpdir = path.join(os.tmpdir(), 'hydro', `${Math.random()}.import`);
         const zip = new AdmZip(this.request.files.file.path);
@@ -298,7 +299,10 @@ class ProblemImportHydroHandler extends Handler {
                 const pdoc: ProblemDoc = yaml.load(content) as any;
                 const current = await problem.get(domainId, pdoc.pid);
                 const pid = current ? undefined : pdoc.pid;
-                const docId = await problem.add(domainId, pid, pdoc.title, pdoc.content, pdoc.owner, pdoc.tag, pdoc.hidden);
+                const docId = await problem.add(
+                    domainId, pid, pdoc.title, pdoc.content,
+                    keepUser ? pdoc.owner : this.user._id, pdoc.tag, pdoc.hidden,
+                );
                 if (files.includes('testdata')) {
                     const datas = await fs.readdir(path.join(tmpdir, i, 'testdata'), { withFileTypes: true });
                     for (const f of datas) {
diff --git a/packages/ui-default/templates/problem_import.html b/packages/ui-default/templates/problem_import.html
index 700de5597..59d6ee5a1 100644
--- a/packages/ui-default/templates/problem_import.html
+++ b/packages/ui-default/templates/problem_import.html
@@ -6,8 +6,9 @@
       <div class="section__body">
         <form method="post" enctype="multipart/form-data">
           <input type="hidden" name="csrfToken" value="{{ handler.csrfToken }}">
-          <p>{{ _('Upload zipfile') }} ({{ _('Type') }}: {{type}}):
+          <p>{{ _('Upload zipfile') }} {% if type %}({{ _('Type') }}: {{type}}){% endif %}:
             <input type="file" name="file">
+            {% if handler.user.hasPriv(PRIV.PRIV_EDIT_SYSTEM) not type %}<input type="checkbox" name="keepUser">{% endif %}
             <input type="submit" value="{{ _('Upload') }}" class="rounded primary button">
           </p>
         </form>