diff --git a/gulpfile.js b/gulpfile.js
index f994f0029a..7220d8421a 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -2,66 +2,98 @@
  * Gulp tasks
  */
 
-const fs = require('fs');
-const gulp = require('gulp');
-const replace = require('gulp-replace');
-const terser = require('gulp-terser');
-const cssnano = require('gulp-cssnano');
+const fs = require("fs");
+const gulp = require("gulp");
+const replace = require("gulp-replace");
+const terser = require("gulp-terser");
+const cssnano = require("gulp-cssnano");
 
-const locales = require('./locales');
-const meta = require('./package.json');
+const locales = require("./locales");
+const meta = require("./package.json");
 
-gulp.task('copy:backend:views', () =>
-	gulp.src('./packages/backend/src/server/web/views/**/*').pipe(gulp.dest('./packages/backend/built/server/web/views'))
+gulp.task("copy:backend:views", () =>
+	gulp
+		.src("./packages/backend/src/server/web/views/**/*")
+		.pipe(gulp.dest("./packages/backend/built/server/web/views")),
 );
 
-
-gulp.task('copy:backend:custom', () =>
-	gulp.src('./custom/assets/**/*').pipe(gulp.dest('./packages/backend/assets/'))
+gulp.task("copy:backend:custom", () =>
+	gulp
+		.src("./custom/assets/**/*")
+		.pipe(gulp.dest("./packages/backend/assets/")),
 );
 
-gulp.task('copy:client:fonts', () =>
-	gulp.src('./packages/client/node_modules/three/examples/fonts/**/*').pipe(gulp.dest('./built/_client_dist_/fonts/'))
+gulp.task("copy:client:fonts", () =>
+	gulp
+		.src("./packages/client/node_modules/three/examples/fonts/**/*")
+		.pipe(gulp.dest("./built/_client_dist_/fonts/")),
 );
 
-gulp.task('copy:client:locales', cb => {
-	fs.mkdirSync('./built/_client_dist_/locales', { recursive: true });
+gulp.task("copy:client:locales", (cb) => {
+	fs.mkdirSync("./built/_client_dist_/locales", { recursive: true });
 
-	const v = { '_version_': meta.version };
+	const v = { _version_: meta.version };
 
 	for (const [lang, locale] of Object.entries(locales)) {
-		fs.writeFileSync(`./built/_client_dist_/locales/${lang}.${meta.version}.json`, JSON.stringify({ ...locale, ...v }), 'utf-8');
+		fs.writeFileSync(
+			`./built/_client_dist_/locales/${lang}.${meta.version}.json`,
+			JSON.stringify({ ...locale, ...v }),
+			"utf-8",
+		);
 	}
 
 	cb();
 });
 
-
-gulp.task('build:backend:script', () => {
-	return gulp.src(['./packages/backend/src/server/web/boot.js', './packages/backend/src/server/web/bios.js', './packages/backend/src/server/web/cli.js'])
-		.pipe(replace('LANGS', JSON.stringify(Object.keys(locales))))
-		.pipe(terser({
-			toplevel: true
-		}))
-		.pipe(gulp.dest('./packages/backend/built/server/web/'));
+gulp.task("build:backend:script", () => {
+	return gulp
+		.src([
+			"./packages/backend/src/server/web/boot.js",
+			"./packages/backend/src/server/web/bios.js",
+			"./packages/backend/src/server/web/cli.js",
+		])
+		.pipe(replace("LANGS", JSON.stringify(Object.keys(locales))))
+		.pipe(
+			terser({
+				toplevel: true,
+			}),
+		)
+		.pipe(gulp.dest("./packages/backend/built/server/web/"));
 });
 
-gulp.task('build:backend:style', () => {
-	return gulp.src(['./packages/backend/src/server/web/style.css', './packages/backend/src/server/web/bios.css', './packages/backend/src/server/web/cli.css'])
-		.pipe(cssnano({
-			zindex: false
-		}))
-		.pipe(gulp.dest('./packages/backend/built/server/web/'));
+gulp.task("build:backend:style", () => {
+	return gulp
+		.src([
+			"./packages/backend/src/server/web/style.css",
+			"./packages/backend/src/server/web/bios.css",
+			"./packages/backend/src/server/web/cli.css",
+		])
+		.pipe(
+			cssnano({
+				zindex: false,
+			}),
+		)
+		.pipe(gulp.dest("./packages/backend/built/server/web/"));
 });
 
-gulp.task('build', gulp.parallel(
-	'copy:client:locales', 'copy:backend:views', 'copy:backend:custom', 'build:backend:script', 'build:backend:style', 'copy:client:fonts'
-));
+gulp.task(
+	"build",
+	gulp.parallel(
+		"copy:client:locales",
+		"copy:backend:views",
+		"copy:backend:custom",
+		"build:backend:script",
+		"build:backend:style",
+		"copy:client:fonts",
+	),
+);
 
-gulp.task('default', gulp.task('build'));
+gulp.task("default", gulp.task("build"));
 
-gulp.task('watch', () => {
-	gulp.watch([
-		'./packages/*/src/**/*',
-	], { ignoreInitial: false }, gulp.task('build'));
+gulp.task("watch", () => {
+	gulp.watch(
+		["./packages/*/src/**/*"],
+		{ ignoreInitial: false },
+		gulp.task("build"),
+	);
 });
diff --git a/package.json b/package.json
index 1118cc39d2..a03c5dff1b 100644
--- a/package.json
+++ b/package.json
@@ -55,7 +55,7 @@
 		"gulp-replace": "1.1.4",
 		"gulp-terser": "2.1.0",
 		"install-peers": "^1.0.4",
-		"rome": "^11.0.0",
+		"rome": "^12.1.3",
 		"start-server-and-test": "1.15.2",
 		"typescript": "4.9.4"
 	}
diff --git a/packages/backend/package.json b/packages/backend/package.json
index 8ad4a46e75..0d7ea1f925 100644
--- a/packages/backend/package.json
+++ b/packages/backend/package.json
@@ -18,7 +18,7 @@
 		"lint": "pnpm rome check \"src/**/*.ts\"",
 		"mocha": "cross-env NODE_ENV=test TS_NODE_FILES=true TS_NODE_TRANSPILE_ONLY=true TS_NODE_PROJECT=\"./test/tsconfig.json\" mocha",
 		"test": "pnpm run mocha",
-		"format": "pnpm rome format * --write && pnpm rome check --apply-suggested *"
+		"format": "pnpm rome format * --write && pnpm rome check --apply *"
 	},
 	"resolutions": {
 		"chokidar": "^3.3.1"
diff --git a/packages/backend/src/boot/master.ts b/packages/backend/src/boot/master.ts
index df5ad1d67a..17b84c74a5 100644
--- a/packages/backend/src/boot/master.ts
+++ b/packages/backend/src/boot/master.ts
@@ -167,7 +167,7 @@ async function connectDb(): Promise<void> {
 	}
 }
 
-async function spawnWorkers(limit: number = 1) {
+async function spawnWorkers(limit = 1) {
 	const workers = Math.min(limit, os.cpus().length);
 	bootLogger.info(`Starting ${workers} worker${workers === 1 ? "" : "s"}...`);
 	await Promise.all([...Array(workers)].map(spawnWorker));
diff --git a/packages/backend/src/remote/activitypub/db-resolver.ts b/packages/backend/src/remote/activitypub/db-resolver.ts
index 0a2aec9e85..44ff70c56c 100644
--- a/packages/backend/src/remote/activitypub/db-resolver.ts
+++ b/packages/backend/src/remote/activitypub/db-resolver.ts
@@ -67,8 +67,6 @@ export function parseUri(value: string | IObject): UriParseResult {
 }
 
 export default class DbResolver {
-	constructor() {}
-
 	/**
 	 * AP Note => Misskey Note in DB
 	 */
diff --git a/packages/backend/src/remote/activitypub/misc/ld-signature.ts b/packages/backend/src/remote/activitypub/misc/ld-signature.ts
index 0a4ec3a539..1fb452c079 100644
--- a/packages/backend/src/remote/activitypub/misc/ld-signature.ts
+++ b/packages/backend/src/remote/activitypub/misc/ld-signature.ts
@@ -11,8 +11,6 @@ export class LdSignature {
 	public preLoad = true;
 	public loderTimeout = 10 * 1000;
 
-	constructor() {}
-
 	public async signRsaSignature2017(
 		data: any,
 		privateKey: string,
diff --git a/packages/backend/src/server/api/stream/index.ts b/packages/backend/src/server/api/stream/index.ts
index b8482c5686..e268b580f5 100644
--- a/packages/backend/src/server/api/stream/index.ts
+++ b/packages/backend/src/server/api/stream/index.ts
@@ -46,7 +46,7 @@ export default class Connection {
 	private channels: Channel[] = [];
 	private subscribingNotes: Map<string, number> = new Map();
 	private cachedNotes: Packed<"Note">[] = [];
-	private isMastodonCompatible: boolean = false;
+	private isMastodonCompatible = false;
 	private host: string;
 	private accessToken: string;
 	private currentSubscribe: string[][] = [];
diff --git a/packages/backend/src/services/drive/image-processor.ts b/packages/backend/src/services/drive/image-processor.ts
index 55869f478f..da5bfee188 100644
--- a/packages/backend/src/services/drive/image-processor.ts
+++ b/packages/backend/src/services/drive/image-processor.ts
@@ -14,7 +14,7 @@ export async function convertToWebp(
 	path: string,
 	width: number,
 	height: number,
-	quality: number = 85,
+	quality = 85,
 ): Promise<IImage> {
 	return convertSharpToWebp(await sharp(path), width, height, quality);
 }
@@ -23,7 +23,7 @@ export async function convertSharpToWebp(
 	sharp: sharp.Sharp,
 	width: number,
 	height: number,
-	quality: number = 85,
+	quality = 85,
 ): Promise<IImage> {
 	const data = await sharp
 		.resize(width, height, {
diff --git a/packages/client/src/scripts/katex-macro.ts b/packages/client/src/scripts/katex-macro.ts
index 4c176b2962..f91e657da9 100644
--- a/packages/client/src/scripts/katex-macro.ts
+++ b/packages/client/src/scripts/katex-macro.ts
@@ -14,7 +14,7 @@ function parseSingleKaTeXMacro(src: string): [string, KaTeXMacro] {
 	if (!src.startsWith("\\newcommand") || src.slice(-1) !== "}") return invalid;
 
 	// current index we are checking (= "\\newcommand".length)
-	let currentPos: number = 11;
+	let currentPos = 11;
 	currentPos = skipSpaces(currentPos);
 
 	// parse {\name}, (\name), or [\name]
@@ -61,8 +61,8 @@ function parseSingleKaTeXMacro(src: string): [string, KaTeXMacro] {
 	currentPos = skipSpaces(currentPos);
 
 	while (currentPos < src.length - 1) {
-		let numbersignPos: number = -1;
-		let isEscaped: boolean = false;
+		let numbersignPos = -1;
+		let isEscaped = false;
 
 		for (let i = currentPos; i < src.length - 1; ++i) {
 			if (src[i] !== "\\" && src[i] !== "#") {
diff --git a/packages/client/src/scripts/sticky-sidebar.ts b/packages/client/src/scripts/sticky-sidebar.ts
index 6602d4a3d5..3c42ecb3b4 100644
--- a/packages/client/src/scripts/sticky-sidebar.ts
+++ b/packages/client/src/scripts/sticky-sidebar.ts
@@ -7,7 +7,7 @@ export class StickySidebar {
 	private isTop = false;
 	private isBottom = false;
 	private offsetTop: number;
-	private globalHeaderHeight: number = 59;
+	private globalHeaderHeight = 59;
 
 	constructor(
 		container: StickySidebar["container"],
diff --git a/packages/sw/package.json b/packages/sw/package.json
index 6c052b5cca..f64bbfd0a4 100644
--- a/packages/sw/package.json
+++ b/packages/sw/package.json
@@ -5,7 +5,7 @@
 		"build": "webpack",
 		"watch": "pnpm swc src -d built -D -w",
 		"lint": "pnpm rome check \"src/**/*.ts\"",
-		"format": "pnpm rome format * --write && pnpm rome check --apply-suggested *"
+		"format": "pnpm rome format * --write && pnpm rome check --apply *"
 	},
 	"devDependencies": {
 		"@swc/cli": "^0.1.62",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 205059075c..463f4247a6 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -64,8 +64,8 @@ importers:
         specifier: ^1.0.4
         version: 1.0.4
       rome:
-        specifier: ^11.0.0
-        version: 11.0.0
+        specifier: ^12.1.3
+        version: 12.1.3
       start-server-and-test:
         specifier: 1.15.2
         version: 1.15.2
@@ -2666,48 +2666,48 @@ packages:
       picomatch: 2.3.1
     dev: true
 
-  /@rometools/cli-darwin-arm64@11.0.0:
-    resolution: {integrity: sha512-F3vkdY+s3FLIEnAjSbyHTuIPB88cLpccimW4ecid5I7S6GzGG3iUJI4xT00JhH73K4P/qW20/9r+kH1T9Du8Xg==}
+  /@rometools/cli-darwin-arm64@12.1.3:
+    resolution: {integrity: sha512-AmFTUDYjBuEGQp/Wwps+2cqUr+qhR7gyXAUnkL5psCuNCz3807TrUq/ecOoct5MIavGJTH6R4aaSL6+f+VlBEg==}
     cpu: [arm64]
     os: [darwin]
     requiresBuild: true
     dev: true
     optional: true
 
-  /@rometools/cli-darwin-x64@11.0.0:
-    resolution: {integrity: sha512-X6jhtS6Iml4GOzgNtnLwIp/KXXhSdqeVyfv69m/AHnIzx3gQAjPZ7BPnJLvTCbhe4SKHL+uTZYFSCJpkUUKE6w==}
+  /@rometools/cli-darwin-x64@12.1.3:
+    resolution: {integrity: sha512-k8MbWna8q4LRlb005N2X+JS1UQ+s3ZLBBvwk4fP8TBxlAJXUz17jLLu/Fi+7DTTEmMhM84TWj4FDKW+rNar28g==}
     cpu: [x64]
     os: [darwin]
     requiresBuild: true
     dev: true
     optional: true
 
-  /@rometools/cli-linux-arm64@11.0.0:
-    resolution: {integrity: sha512-dktTJJlTpmycBZ2TwhJBcAO8ztK8DdevdyZnFFxdYRvtmJgTjIsC2UFayf/SbKew8B8q1IhI0it+D6ihAeIpeg==}
+  /@rometools/cli-linux-arm64@12.1.3:
+    resolution: {integrity: sha512-X/uLhJ2/FNA3nu5TiyeNPqiD3OZoFfNfRvw6a3ut0jEREPvEn72NI7WPijH/gxSz55znfQ7UQ6iM4DZumUknJg==}
     cpu: [arm64]
     os: [linux]
     requiresBuild: true
     dev: true
     optional: true
 
-  /@rometools/cli-linux-x64@11.0.0:
-    resolution: {integrity: sha512-WVcnXPNdWGUWo0p4NU8YzuthjYR7q+b4vRcjdxtP1DlpphZmSsoC/RSE85nEqRAz8hChcKUansVzOPM8BSsuGA==}
+  /@rometools/cli-linux-x64@12.1.3:
+    resolution: {integrity: sha512-csP17q1eWiUXx9z6Jr/JJPibkplyKIwiWPYNzvPCGE8pHlKhwZj3YHRuu7Dm/4EOqx0XFIuqqWZUYm9bkIC8xg==}
     cpu: [x64]
     os: [linux]
     requiresBuild: true
     dev: true
     optional: true
 
-  /@rometools/cli-win32-arm64@11.0.0:
-    resolution: {integrity: sha512-tPj6RThQzS7Q45jqQll7NlTYvNcsg/BEP3LYiiazqSh9FAFnMkrV6ewUcMPKWyAfiyLs7jlz4rRvdNRUSygzfQ==}
+  /@rometools/cli-win32-arm64@12.1.3:
+    resolution: {integrity: sha512-RymHWeod57EBOJY4P636CgUwYA6BQdkQjh56XKk4pLEHO6X1bFyMet2XL7KlHw5qOTalzuzf5jJqUs+vf3jdXQ==}
     cpu: [arm64]
     os: [win32]
     requiresBuild: true
     dev: true
     optional: true
 
-  /@rometools/cli-win32-x64@11.0.0:
-    resolution: {integrity: sha512-bmBai8WHxYjsGk1+je7ZTfCUCWq30WJI3pQM8pzTA674lfGTZ9ymJoZwTaIMSO4rL5V9mlO6uLunsBKso9VqOg==}
+  /@rometools/cli-win32-x64@12.1.3:
+    resolution: {integrity: sha512-yHSKYidqJMV9nADqg78GYA+cZ0hS1twANAjiFibQdXj9aGzD+s/IzIFEIi/U/OBLvWYg/SCw0QVozi2vTlKFDQ==}
     cpu: [x64]
     os: [win32]
     requiresBuild: true
@@ -13531,18 +13531,18 @@ packages:
       fsevents: 2.3.2
     dev: true
 
-  /rome@11.0.0:
-    resolution: {integrity: sha512-rRo6JOwpMLc3OkeTDRXkrmrDqnxDvZ75GS4f0jLDBNmRgDXWbu0F8eVnJoRn+VbK2AE7vWvhVOMBjnWowcopkQ==}
+  /rome@12.1.3:
+    resolution: {integrity: sha512-e+ff72hxDpe/t5/Us7YRBVw3PBET7SeczTQNn6tvrWdrCaAw3qOukQQ+tDCkyFtS4yGsnhjrJbm43ctNbz27Yg==}
     engines: {node: '>=14.*'}
     hasBin: true
     requiresBuild: true
     optionalDependencies:
-      '@rometools/cli-darwin-arm64': 11.0.0
-      '@rometools/cli-darwin-x64': 11.0.0
-      '@rometools/cli-linux-arm64': 11.0.0
-      '@rometools/cli-linux-x64': 11.0.0
-      '@rometools/cli-win32-arm64': 11.0.0
-      '@rometools/cli-win32-x64': 11.0.0
+      '@rometools/cli-darwin-arm64': 12.1.3
+      '@rometools/cli-darwin-x64': 12.1.3
+      '@rometools/cli-linux-arm64': 12.1.3
+      '@rometools/cli-linux-x64': 12.1.3
+      '@rometools/cli-win32-arm64': 12.1.3
+      '@rometools/cli-win32-x64': 12.1.3
     dev: true
 
   /rss-parser@3.13.0:
diff --git a/rome.json b/rome.json
index 7a51b60e68..09db5f75e2 100644
--- a/rome.json
+++ b/rome.json
@@ -16,6 +16,7 @@
 			"packages/backend/nsfw-model/",
 			"packages/client/src/emojilist.json",
 			"*.md",
+			"**/tsconfig.json",
 			"*/.yml"
 		]
 	}