diff --git a/src/daemons/server-stats.ts b/src/daemons/server-stats.ts
index b82f421779..ee62c32d7e 100644
--- a/src/daemons/server-stats.ts
+++ b/src/daemons/server-stats.ts
@@ -56,20 +56,12 @@ function cpuUsage() {
 
 // MEMORY(excl buffer + cache) STAT
 async function usedMem() {
-	try {
-		const data = await sysUtils.mem();
-		return data.active;
-	} catch (error) {
-		throw error;
-	}
+	const data = await sysUtils.mem();
+	return data.active;
 }
 
 // TOTAL MEMORY STAT
 async function totalMem() {
-	try {
-		const data = await sysUtils.mem();
-		return data.total;
-	} catch (error) {
-		throw error;
-	}
+	const data = await sysUtils.mem();
+	return data.total;
 }
diff --git a/src/prelude/maybe.ts b/src/prelude/maybe.ts
index f9ac95c0b5..0b4b543ca5 100644
--- a/src/prelude/maybe.ts
+++ b/src/prelude/maybe.ts
@@ -1,19 +1,19 @@
-export interface Maybe<T> {
-	isJust(): this is Just<T>;
+export interface IMaybe<T> {
+	isJust(): this is IJust<T>;
 }
 
-export type Just<T> = Maybe<T> & {
-	get(): T
-};
+export interface IJust<T> extends IMaybe<T> {
+	get(): T;
+}
 
-export function just<T>(value: T): Just<T> {
+export function just<T>(value: T): IJust<T> {
 	return {
 		isJust: () => true,
 		get: () => value
 	};
 }
 
-export function nothing<T>(): Maybe<T> {
+export function nothing<T>(): IMaybe<T> {
 	return {
 		isJust: () => false,
 	};
diff --git a/src/queue/processors/db/delete-drive-files.ts b/src/queue/processors/db/delete-drive-files.ts
index 3de960a25e..cedfdef236 100644
--- a/src/queue/processors/db/delete-drive-files.ts
+++ b/src/queue/processors/db/delete-drive-files.ts
@@ -16,10 +16,9 @@ export async function deleteDriveFiles(job: Bull.Job, done: any): Promise<void>
 	});
 
 	let deletedCount = 0;
-	let ended = false;
 	let cursor: any = null;
 
-	while (!ended) {
+	while (true) {
 		const files = await DriveFile.find({
 			userId: user._id,
 			...(cursor ? { _id: { $gt: cursor } } : {})
@@ -31,7 +30,6 @@ export async function deleteDriveFiles(job: Bull.Job, done: any): Promise<void>
 		});
 
 		if (files.length === 0) {
-			ended = true;
 			job.progress(100);
 			break;
 		}
diff --git a/src/queue/processors/db/export-blocking.ts b/src/queue/processors/db/export-blocking.ts
index 7f32c06472..73128aa41a 100644
--- a/src/queue/processors/db/export-blocking.ts
+++ b/src/queue/processors/db/export-blocking.ts
@@ -32,10 +32,9 @@ export async function exportBlocking(job: Bull.Job, done: any): Promise<void> {
 	const stream = fs.createWriteStream(path, { flags: 'a' });
 
 	let exportedCount = 0;
-	let ended = false;
 	let cursor: any = null;
 
-	while (!ended) {
+	while (true) {
 		const blockings = await Blocking.find({
 			blockerId: user._id,
 			...(cursor ? { _id: { $gt: cursor } } : {})
@@ -47,7 +46,6 @@ export async function exportBlocking(job: Bull.Job, done: any): Promise<void> {
 		});
 
 		if (blockings.length === 0) {
-			ended = true;
 			job.progress(100);
 			break;
 		}
diff --git a/src/queue/processors/db/export-following.ts b/src/queue/processors/db/export-following.ts
index 019414072a..8387baa86d 100644
--- a/src/queue/processors/db/export-following.ts
+++ b/src/queue/processors/db/export-following.ts
@@ -32,10 +32,9 @@ export async function exportFollowing(job: Bull.Job, done: any): Promise<void> {
 	const stream = fs.createWriteStream(path, { flags: 'a' });
 
 	let exportedCount = 0;
-	let ended = false;
 	let cursor: any = null;
 
-	while (!ended) {
+	while (true) {
 		const followings = await Following.find({
 			followerId: user._id,
 			...(cursor ? { _id: { $gt: cursor } } : {})
@@ -47,7 +46,6 @@ export async function exportFollowing(job: Bull.Job, done: any): Promise<void> {
 		});
 
 		if (followings.length === 0) {
-			ended = true;
 			job.progress(100);
 			break;
 		}
diff --git a/src/queue/processors/db/export-mute.ts b/src/queue/processors/db/export-mute.ts
index 5ded7cf651..517c2bee7f 100644
--- a/src/queue/processors/db/export-mute.ts
+++ b/src/queue/processors/db/export-mute.ts
@@ -32,10 +32,9 @@ export async function exportMute(job: Bull.Job, done: any): Promise<void> {
 	const stream = fs.createWriteStream(path, { flags: 'a' });
 
 	let exportedCount = 0;
-	let ended = false;
 	let cursor: any = null;
 
-	while (!ended) {
+	while (true) {
 		const mutes = await Mute.find({
 			muterId: user._id,
 			...(cursor ? { _id: { $gt: cursor } } : {})
@@ -47,7 +46,6 @@ export async function exportMute(job: Bull.Job, done: any): Promise<void> {
 		});
 
 		if (mutes.length === 0) {
-			ended = true;
 			job.progress(100);
 			break;
 		}
diff --git a/src/queue/processors/db/export-notes.ts b/src/queue/processors/db/export-notes.ts
index 8f3cdc5b99..bcf664fdb5 100644
--- a/src/queue/processors/db/export-notes.ts
+++ b/src/queue/processors/db/export-notes.ts
@@ -42,10 +42,9 @@ export async function exportNotes(job: Bull.Job, done: any): Promise<void> {
 	});
 
 	let exportedNotesCount = 0;
-	let ended = false;
 	let cursor: any = null;
 
-	while (!ended) {
+	while (true) {
 		const notes = await Note.find({
 			userId: user._id,
 			...(cursor ? { _id: { $gt: cursor } } : {})
@@ -57,7 +56,6 @@ export async function exportNotes(job: Bull.Job, done: any): Promise<void> {
 		});
 
 		if (notes.length === 0) {
-			ended = true;
 			job.progress(100);
 			break;
 		}
diff --git a/src/remote/activitypub/request.ts b/src/remote/activitypub/request.ts
index 7fd05f776e..df6058d6b6 100644
--- a/src/remote/activitypub/request.ts
+++ b/src/remote/activitypub/request.ts
@@ -35,7 +35,7 @@ export default async (user: ILocalUser, url: string, object: any) => {
 	const addr = await resolveAddr(hostname);
 	if (!addr) return;
 
-	const _ = new Promise((resolve, reject) => {
+	await new  Promise((resolve, reject) => {
 		const req = request({
 			protocol,
 			hostname: addr,
@@ -82,8 +82,6 @@ export default async (user: ILocalUser, url: string, object: any) => {
 		req.end(data);
 	});
 
-	await _;
-
 	//#region Log
 	publishApLogStream({
 		direction: 'out',