diff --git a/packages/hydrooj/package.json b/packages/hydrooj/package.json
index b5b1a43a..4c733a0c 100644
--- a/packages/hydrooj/package.json
+++ b/packages/hydrooj/package.json
@@ -1,6 +1,6 @@
 {
     "name": "hydrooj",
-    "version": "4.7.4",
+    "version": "4.7.5",
     "bin": "bin/hydrooj.js",
     "main": "src/plugin-api",
     "module": "src/plugin-api",
diff --git a/packages/hydrooj/src/handler/problem.ts b/packages/hydrooj/src/handler/problem.ts
index 3b64f477..1c279b8c 100644
--- a/packages/hydrooj/src/handler/problem.ts
+++ b/packages/hydrooj/src/handler/problem.ts
@@ -666,22 +666,22 @@ export class ProblemConfigHandler extends ProblemManageHandler {
 export class ProblemFilesHandler extends ProblemDetailHandler {
     notUsage = true;
 
+    @param('d', Types.CommaSeperatedArray, true)
     @param('pjax', Types.Boolean)
     @param('sidebar', Types.Boolean)
-    async get(domainId: string, pjax = false, sidebar = false) {
-        this.response.body.testdata = sortFiles(this.pdoc.data || []);
+    async get(domainId: string, d = ['testdata', 'additional_file'], pjax = false, sidebar = false) {
+        this.response.body.testdata = d.includes('testdata') ? sortFiles(this.pdoc.data || []) : [];
         this.response.body.reference = this.pdoc.reference;
-        this.response.body.additional_file = sortFiles(this.pdoc.additional_file || []);
+        this.response.body.additional_file = d.includes('additional_file') ? sortFiles(this.pdoc.additional_file || []) : [];
         if (pjax) {
             const { testdata, additional_file } = this.response.body;
             const owner = await user.getById(domainId, this.pdoc.owner);
             const args = {
                 testdata, additional_file, pdoc: this.pdoc, owner_udoc: owner, sidebar,
             };
-            const tasks = [
-                this.renderHTML('partials/problem_files.html', { ...args, filetype: 'testdata' }),
-                this.renderHTML('partials/problem_files.html', { ...args, filetype: 'additional_file' }),
-            ];
+            const tasks = [];
+            if (d.includes('testdata')) tasks.push(this.renderHTML('partials/problem_files.html', { ...args, filetype: 'testdata' }));
+            if (d.includes('additional_file')) tasks.push(this.renderHTML('partials/problem_files.html', { ...args, filetype: 'additional_file' }));
             if (!sidebar) tasks.push(this.renderHTML('partials/problem-sidebar-information.html', args));
             this.response.body = {
                 fragments: (await Promise.all(tasks)).map((i) => ({ html: i })),
diff --git a/packages/ui-default/api.ts b/packages/ui-default/api.ts
index 4abe24b2..8b8c7add 100644
--- a/packages/ui-default/api.ts
+++ b/packages/ui-default/api.ts
@@ -6,6 +6,7 @@ export * from './components/dialog';
 export * as bus from './bus';
 export { default as AnsiUp } from 'ansi_up';
 export { default as loadMonaco } from './components/monaco/loader';
+export { default as uploadFiles } from './components/upload';
 export * as redux from 'react-redux';
 export * from './components/zipDownloader';
 export { default as $ } from 'jquery';
diff --git a/packages/ui-default/components/upload.ts b/packages/ui-default/components/upload.ts
index 915022ee..f27d387c 100644
--- a/packages/ui-default/components/upload.ts
+++ b/packages/ui-default/components/upload.ts
@@ -68,7 +68,7 @@ export default async function uploadFiles(endpoint = '', files: File[] | FileLis
     Notification.success(i18n('File uploaded successfully.'));
     if (options.pjax) {
       let params = '';
-      if (options.type) params += `?testdata=${options.type === 'testdata'}&additional_file=${options.type === 'additional_file'}`;
+      if (options.type) params += `?d=${options.type}`;
       if (options.sidebar) params += `${params ? '&' : '?'}sidebar=true`;
       await pjax.request({ push: false, url: `${endpoint}${params || ''}` });
     }
diff --git a/packages/ui-default/package.json b/packages/ui-default/package.json
index a954bc35..9720c138 100644
--- a/packages/ui-default/package.json
+++ b/packages/ui-default/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hydrooj/ui-default",
-  "version": "4.47.3",
+  "version": "4.47.4",
   "author": "undefined <i@undefined.moe>",
   "license": "AGPL-3.0",
   "main": "index.ts",
diff --git a/packages/ui-default/pages/problem_config.page.tsx b/packages/ui-default/pages/problem_config.page.tsx
index 29c4f44d..284d2ac9 100644
--- a/packages/ui-default/pages/problem_config.page.tsx
+++ b/packages/ui-default/pages/problem_config.page.tsx
@@ -57,7 +57,7 @@ const page = new NamedPage('problem_config', () => {
         type: 'CONFIG_DELETE_TESTDATA',
         value: file,
       });
-      await pjax.request({ url: './files?testdata=false&sidebar=true', push: false });
+      await pjax.request({ url: './files?d=testdata&sidebar=true', push: false });
     } catch (error) {
       Notification.error(error.message);
     }
diff --git a/packages/ui-default/pages/problem_edit.page.js b/packages/ui-default/pages/problem_edit.page.js
index ae78ab32..857b2b25 100644
--- a/packages/ui-default/pages/problem_edit.page.js
+++ b/packages/ui-default/pages/problem_edit.page.js
@@ -214,7 +214,7 @@ export default new NamedPage(['problem_create', 'problem_edit'], (pagename) => {
         type: 'additional_file',
       });
       Notification.success(i18n('File have been deleted.'));
-      await pjax.request({ url: './files?testdata=false&sidebar=true', push: false });
+      await pjax.request({ url: './files?d=additional_file&sidebar=true', push: false });
     } catch (error) {
       Notification.error(error.message);
     }