diff --git a/src/models/notification.ts b/src/models/notification.ts
index 394e49f36..5cf1e140c 100644
--- a/src/models/notification.ts
+++ b/src/models/notification.ts
@@ -48,7 +48,7 @@ export interface INotification {
 	/**
 	 * 通知が読まれたかどうか
 	 */
-	isRead: Boolean;
+	isRead: boolean;
 }
 
 export const packMany = (
diff --git a/src/remote/activitypub/models/person.ts b/src/remote/activitypub/models/person.ts
index 74fcdc10a..2bd0eaf25 100644
--- a/src/remote/activitypub/models/person.ts
+++ b/src/remote/activitypub/models/person.ts
@@ -164,7 +164,7 @@ export async function createPerson(uri: string, resolver?: Resolver): Promise<IU
 			uri: person.id,
 			url: person.url,
 			isBot: isBot,
-			isCat: (person as any).isCat === true ? true : false
+			isCat: (person as any).isCat === true
 		}) as IRemoteUser;
 	} catch (e) {
 		// duplicate key error
@@ -322,7 +322,7 @@ export async function updatePerson(uri: string, resolver?: Resolver, hint?: obje
 			url: person.url,
 			endpoints: person.endpoints,
 			isBot: object.type == 'Service',
-			isCat: (person as any).isCat === true ? true : false,
+			isCat: (person as any).isCat === true
 			isLocked: person.manuallyApprovesFollowers,
 			createdAt: Date.parse(person.published) || null,
 			publicKey: {
diff --git a/src/server/api/endpoints/notes.ts b/src/server/api/endpoints/notes.ts
index f7b7b65ca..b48919707 100644
--- a/src/server/api/endpoints/notes.ts
+++ b/src/server/api/endpoints/notes.ts
@@ -106,9 +106,7 @@ export default define(meta, (ps) => new Promise(async (res, rej) => {
 
 	const withFiles = ps.withFiles != undefined ? ps.withFiles : ps.media;
 
-	if (withFiles) {
-		query.fileIds = withFiles ? { $exists: true, $ne: null } : [];
-	}
+	if (withFiles) query.fileIds = { $exists: true, $ne: null };
 
 	if (ps.poll != undefined) {
 		query.poll = ps.poll ? { $exists: true, $ne: null } : null;
diff --git a/src/server/web/docs.ts b/src/server/web/docs.ts
index b535a236d..9cc54cdf0 100644
--- a/src/server/web/docs.ts
+++ b/src/server/web/docs.ts
@@ -30,7 +30,7 @@ async function genVars(lang: string): Promise<{ [key: string]: any }> {
 
 	const entities = glob.sync('src/docs/api/entities/**/*.yaml', { cwd });
 	vars['entities'] = entities.map(x => {
-		const _x = yaml.safeLoad(fs.readFileSync(cwd + x, 'utf-8')) as any;
+		const _x = yaml.safeLoad(fs.readFileSync(cwd + x, 'utf-8'));
 		return _x.name;
 	});
 
@@ -197,7 +197,7 @@ router.get('/*/api/entities/*', async ctx => {
 	const lang = ctx.params[0];
 	const entity = ctx.params[1];
 
-	const x = yaml.safeLoad(fs.readFileSync(path.resolve(`${__dirname}/../../../src/docs/api/entities/${entity}.yaml`), 'utf-8')) as any;
+	const x = yaml.safeLoad(fs.readFileSync(path.resolve(`${__dirname}/../../../src/docs/api/entities/${entity}.yaml`), 'utf-8'));
 
 	await ctx.render('../../../../src/docs/api/entities/view', Object.assign(await genVars(lang), {
 		id: `api/entities/${entity}`,