diff --git a/packages/ui-default/build/main.ts b/packages/ui-default/build/main.ts
index 6b88a16c4..a57114174 100644
--- a/packages/ui-default/build/main.ts
+++ b/packages/ui-default/build/main.ts
@@ -54,7 +54,7 @@ async function runWebpack({
       }
       if (argv.options.detail) console.log(stats.toString());
       if (!watch && (!stats || stats.hasErrors())) process.exitCode = 1;
-      resolve();
+      resolve(null);
     }
     if (watch) compiler.watch({}, compilerCallback);
     else compiler.run(compilerCallback);
@@ -77,7 +77,7 @@ async function runGulp() {
     gulp.on('stop', ({ uid, name }) => {
       log(chalk.green('Finished: %s'), chalk.reset(name));
       taskList[uid] = false;
-      if (Object.values(taskList).filter((b) => b).length === 0) resolve();
+      if (Object.values(taskList).filter((b) => b).length === 0) resolve(null);
     });
     gulpTasks.default();
   });
@@ -87,7 +87,7 @@ async function main() {
   const dir = process.cwd();
   process.chdir(root());
   await runGulp();
-  await runWebpack(argv.options);
+  await runWebpack(argv.options as any);
   if (fs.existsSync('public/hydro.js')) {
     fs.copyFileSync('public/hydro.js', `public/hydro-${pkg.version}.js`);
   }
diff --git a/packages/ui-default/package.json b/packages/ui-default/package.json
index 36348762f..019b766ff 100644
--- a/packages/ui-default/package.json
+++ b/packages/ui-default/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hydrooj/ui-default",
-  "version": "4.34.4",
+  "version": "4.34.5",
   "author": "undefined <i@undefined.moe>",
   "license": "AGPL-3.0",
   "main": "hydro.js",
diff --git a/packages/ui-default/templates/layout/html5.html b/packages/ui-default/templates/layout/html5.html
index 8aaee7ef9..3256ad80c 100644
--- a/packages/ui-default/templates/layout/html5.html
+++ b/packages/ui-default/templates/layout/html5.html
@@ -46,7 +46,7 @@
       } catch(e) {
         const s = document.createElement('script');
         s.async = false;
-        s.src = "{{ '/polyfill.js' if process.env.DEV else static_url(global.Hydro.version['ui-default'] + '.polyfill.js') }}";
+        s.src = "{{ '/polyfill.js' if process.env.DEV else static_url('polyfill-' + global.Hydro.version['ui-default'] + '.js') }}";
         document.head.appendChild(s);
       }
     </script>