diff --git a/packages/frontend/src/boot/common.ts b/packages/frontend/src/boot/common.ts
index 9a505ca9f8..7a88b938dd 100644
--- a/packages/frontend/src/boot/common.ts
+++ b/packages/frontend/src/boot/common.ts
@@ -29,7 +29,7 @@ import { fetchCustomEmojis } from '@/custom-emojis.js';
 import { prefer } from '@/preferences.js';
 import { $i } from '@/i.js';
 
-export async function common(createVue: () => App<Element>) {
+export async function common(createVue: () => Promise<App<Element>>) {
 	console.info(`Misskey v${version}`);
 
 	if (_DEV_) {
@@ -263,7 +263,7 @@ export async function common(createVue: () => App<Element>) {
 		});
 	});
 
-	const app = createVue();
+	const app = await createVue();
 
 	if (_DEV_) {
 		app.config.performance = true;
diff --git a/packages/frontend/src/boot/main-boot.ts b/packages/frontend/src/boot/main-boot.ts
index bac7128603..224c441beb 100644
--- a/packages/frontend/src/boot/main-boot.ts
+++ b/packages/frontend/src/boot/main-boot.ts
@@ -32,7 +32,7 @@ import { signout } from '@/signout.js';
 import { migrateOldSettings } from '@/pref-migrate.js';
 
 export async function mainBoot() {
-	const { isClientUpdated, lastVersion } = await common(() => {
+	const { isClientUpdated, lastVersion } = await common(async () => {
 		let uiStyle = ui;
 		const searchParams = new URLSearchParams(window.location.search);
 
@@ -46,19 +46,19 @@ export async function mainBoot() {
 		let rootComponent: Component;
 		switch (uiStyle) {
 			case 'zen':
-				rootComponent = defineAsyncComponent(() => import('@/ui/zen.vue'));
+				rootComponent = await import('@/ui/zen.vue').then(x => x.default);
 				break;
 			case 'deck':
-				rootComponent = defineAsyncComponent(() => import('@/ui/deck.vue'));
+				rootComponent = await import('@/ui/deck.vue').then(x => x.default);
 				break;
 			case 'visitor':
-				rootComponent = defineAsyncComponent(() => import('@/ui/visitor.vue'));
+				rootComponent = await import('@/ui/visitor.vue').then(x => x.default);
 				break;
 			case 'classic':
-				rootComponent = defineAsyncComponent(() => import('@/ui/classic.vue'));
+				rootComponent = await import('@/ui/classic.vue').then(x => x.default);
 				break;
 			default:
-				rootComponent = defineAsyncComponent(() => import('@/ui/universal.vue'));
+				rootComponent = await import('@/ui/universal.vue').then(x => x.default);
 				break;
 		}
 
diff --git a/packages/frontend/src/boot/sub-boot.ts b/packages/frontend/src/boot/sub-boot.ts
index e24c324dfb..036142bc4d 100644
--- a/packages/frontend/src/boot/sub-boot.ts
+++ b/packages/frontend/src/boot/sub-boot.ts
@@ -6,11 +6,10 @@
 import { createApp, defineAsyncComponent } from 'vue';
 import { common } from './common.js';
 import { emojiPicker } from '@/utility/emoji-picker.js';
+import UiMinimum from '@/ui/minimum.vue';
 
 export async function subBoot() {
-	const { isClientUpdated } = await common(() => createApp(
-		defineAsyncComponent(() => import('@/ui/minimum.vue')),
-	));
+	const { isClientUpdated } = await common(async () => createApp(UiMinimum));
 
 	emojiPicker.init();
 }