diff --git a/packages/backend/src/core/FileInfoService.ts b/packages/backend/src/core/FileInfoService.ts
index b8babcb3a7..f3e93b9db7 100644
--- a/packages/backend/src/core/FileInfoService.ts
+++ b/packages/backend/src/core/FileInfoService.ts
@@ -14,7 +14,6 @@ import FFmpeg from 'fluent-ffmpeg';
 import isSvg from 'is-svg';
 import probeImageSize from 'probe-image-size';
 import { type predictionType } from 'nsfwjs';
-import sharp from 'sharp';
 import { sharpBmp } from '@misskey-dev/sharp-read-bmp';
 import { encode } from 'blurhash';
 import { createTempDir } from '@/misc/create-temp.js';
@@ -408,25 +407,14 @@ export class FileInfoService {
 	 * Calculate average color of image
 	 */
 	@bindThis
-	private getBlurhash(path: string, type: string): Promise<string> {
-		return new Promise(async (resolve, reject) => {
-			(await sharpBmp(path, type))
-				.raw()
-				.ensureAlpha()
-				.resize(64, 64, { fit: 'inside' })
-				.toBuffer((err, buffer, info) => {
-					if (err) return reject(err);
+	private async getBlurhash(path: string, type: string): Promise<string> {
+		const sharp = await sharpBmp(path, type);
+		const { data, info } = await sharp
+			.raw()
+			.ensureAlpha()
+			.resize(64, 64, { fit: 'inside' })
+			.toBuffer({ resolveWithObject: true });
 
-					let hash;
-
-					try {
-						hash = encode(new Uint8ClampedArray(buffer), info.width, info.height, 5, 5);
-					} catch (e) {
-						return reject(e);
-					}
-
-					resolve(hash);
-				});
-		});
+		return encode(new Uint8ClampedArray(data), info.width, info.height, 5, 5);
 	}
 }
diff --git a/packages/frontend/src/components/MkSourceCodeAvailablePopup.vue b/packages/frontend/src/components/MkSourceCodeAvailablePopup.vue
index 80f3a6709c..f6cdc4bf3b 100644
--- a/packages/frontend/src/components/MkSourceCodeAvailablePopup.vue
+++ b/packages/frontend/src/components/MkSourceCodeAvailablePopup.vue
@@ -47,9 +47,7 @@ import { instance } from '@/instance.js';
 import { miLocalStorage } from '@/local-storage.js';
 import * as os from '@/os.js';
 
-const emit = defineEmits<{
-	(ev: 'closed'): void;
-}>();
+const emit = defineEmits<(ev: 'closed') => void>();
 
 const zIndex = os.claimZIndex('low');
 
diff --git a/packages/frontend/src/pages/reversi/game.vue b/packages/frontend/src/pages/reversi/game.vue
index dc37a3bf19..d95dce18a2 100644
--- a/packages/frontend/src/pages/reversi/game.vue
+++ b/packages/frontend/src/pages/reversi/game.vue
@@ -10,7 +10,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 </template>
 
 <script lang="ts" setup>
-import { computed, watch, onMounted, ref, shallowRef, onUnmounted } from 'vue';
+import { watch, onMounted, ref, shallowRef, onUnmounted } from 'vue';
 import * as Misskey from 'misskey-js';
 import GameSetting from './game.setting.vue';
 import GameBoard from './game.board.vue';