diff --git a/src/api/endpoints/posts/favorites/create.js b/src/api/endpoints/posts/favorites/create.js
index f2e29bbc3..21ba9ecb2 100644
--- a/src/api/endpoints/posts/favorites/create.js
+++ b/src/api/endpoints/posts/favorites/create.js
@@ -15,40 +15,39 @@ import Post from '../../models/post';
  * @return {Promise<object>}
  */
 module.exports = (params, user) =>
-	new Promise(async (res, rej) =>
-{
-	// Get 'post_id' parameter
-	let postId = params.post_id;
-	if (postId === undefined || postId === null) {
-		return rej('post_id is required');
-	}
+	new Promise(async (res, rej) => {
+		// Get 'post_id' parameter
+		let postId = params.post_id;
+		if (postId === undefined || postId === null) {
+			return rej('post_id is required');
+		}
 
-	// Get favoritee
-	const post = await Post.findOne({
-		_id: new mongo.ObjectID(postId)
+		// Get favoritee
+		const post = await Post.findOne({
+			_id: new mongo.ObjectID(postId)
+		});
+
+		if (post === null) {
+			return rej('post not found');
+		}
+
+		// Check already favorited
+		const exist = await Favorite.findOne({
+			post_id: post._id,
+			user_id: user._id
+		});
+
+		if (exist !== null) {
+			return rej('already favorited');
+		}
+
+		// Create favorite
+		await Favorite.insert({
+			created_at: new Date(),
+			post_id: post._id,
+			user_id: user._id
+		});
+
+		// Send response
+		res();
 	});
-
-	if (post === null) {
-		return rej('post not found');
-	}
-
-	// Check arleady favorited
-	const exist = await Favorite.findOne({
-		post_id: post._id,
-		user_id: user._id
-	});
-
-	if (exist !== null) {
-		return rej('already favorited');
-	}
-
-	// Create favorite
-	await Favorite.insert({
-		created_at: new Date(),
-		post_id: post._id,
-		user_id: user._id
-	});
-
-	// Send response
-	res();
-});
diff --git a/src/api/endpoints/posts/favorites/delete.js b/src/api/endpoints/posts/favorites/delete.js
index e250d1772..974852db2 100644
--- a/src/api/endpoints/posts/favorites/delete.js
+++ b/src/api/endpoints/posts/favorites/delete.js
@@ -15,38 +15,37 @@ import Post from '../../models/post';
  * @return {Promise<object>}
  */
 module.exports = (params, user) =>
-	new Promise(async (res, rej) =>
-{
-	// Get 'post_id' parameter
-	let postId = params.post_id;
-	if (postId === undefined || postId === null) {
-		return rej('post_id is required');
-	}
+	new Promise(async (res, rej) => {
+		// Get 'post_id' parameter
+		let postId = params.post_id;
+		if (postId === undefined || postId === null) {
+			return rej('post_id is required');
+		}
 
-	// Get favoritee
-	const post = await Post.findOne({
-		_id: new mongo.ObjectID(postId)
+		// Get favoritee
+		const post = await Post.findOne({
+			_id: new mongo.ObjectID(postId)
+		});
+
+		if (post === null) {
+			return rej('post not found');
+		}
+
+		// Check arleady favorited
+		const exist = await Favorite.findOne({
+			post_id: post._id,
+			user_id: user._id
+		});
+
+		if (exist === null) {
+			return rej('already not favorited');
+		}
+
+		// Delete favorite
+		await Favorite.deleteOne({
+			_id: exist._id
+		});
+
+		// Send response
+		res();
 	});
-
-	if (post === null) {
-		return rej('post not found');
-	}
-
-	// Check arleady favorited
-	const exist = await Favorite.findOne({
-		post_id: post._id,
-		user_id: user._id
-	});
-
-	if (exist === null) {
-		return rej('already not favorited');
-	}
-
-	// Delete favorite
-	await Favorite.deleteOne({
-		_id: exist._id
-	});
-
-	// Send response
-	res();
-});
diff --git a/src/api/endpoints/posts/likes/create.js b/src/api/endpoints/posts/likes/create.js
index 83debea96..bae8aecc0 100644
--- a/src/api/endpoints/posts/likes/create.js
+++ b/src/api/endpoints/posts/likes/create.js
@@ -17,77 +17,76 @@ import notify from '../../../common/notify';
  * @return {Promise<object>}
  */
 module.exports = (params, user) =>
-	new Promise(async (res, rej) =>
-{
-	// Get 'post_id' parameter
-	let postId = params.post_id;
-	if (postId === undefined || postId === null) {
-		return rej('post_id is required');
-	}
-
-	// Validate id
-	if (!mongo.ObjectID.isValid(postId)) {
-		return rej('incorrect post_id');
-	}
-
-	// Get likee
-	const post = await Post.findOne({
-		_id: new mongo.ObjectID(postId)
-	});
-
-	if (post === null) {
-		return rej('post not found');
-	}
-
-	// Myself
-	if (post.user_id.equals(user._id)) {
-		return rej('-need-translate-');
-	}
-
-	// Check arleady liked
-	const exist = await Like.findOne({
-		post_id: post._id,
-		user_id: user._id,
-		deleted_at: { $exists: false }
-	});
-
-	if (exist !== null) {
-		return rej('already liked');
-	}
-
-	// Create like
-	await Like.insert({
-		created_at: new Date(),
-		post_id: post._id,
-		user_id: user._id
-	});
-
-	// Send response
-	res();
-
-	// Increment likes count
-	Post.update({ _id: post._id }, {
-		$inc: {
-			likes_count: 1
+	new Promise(async (res, rej) => {
+		// Get 'post_id' parameter
+		let postId = params.post_id;
+		if (postId === undefined || postId === null) {
+			return rej('post_id is required');
 		}
-	});
 
-	// Increment user likes count
-	User.update({ _id: user._id }, {
-		$inc: {
-			likes_count: 1
+		// Validate id
+		if (!mongo.ObjectID.isValid(postId)) {
+			return rej('incorrect post_id');
 		}
-	});
 
-	// Increment user liked count
-	User.update({ _id: post.user_id }, {
-		$inc: {
-			liked_count: 1
+		// Get likee
+		const post = await Post.findOne({
+			_id: new mongo.ObjectID(postId)
+		});
+
+		if (post === null) {
+			return rej('post not found');
 		}
-	});
 
-	// Notify
-	notify(post.user_id, user._id, 'like', {
-		post_id: post._id
+		// Myself
+		if (post.user_id.equals(user._id)) {
+			return rej('-need-translate-');
+		}
+
+		// Check arleady liked
+		const exist = await Like.findOne({
+			post_id: post._id,
+			user_id: user._id,
+			deleted_at: { $exists: false }
+		});
+
+		if (exist !== null) {
+			return rej('already liked');
+		}
+
+		// Create like
+		await Like.insert({
+			created_at: new Date(),
+			post_id: post._id,
+			user_id: user._id
+		});
+
+		// Send response
+		res();
+
+		// Increment likes count
+		Post.update({ _id: post._id }, {
+			$inc: {
+				likes_count: 1
+			}
+		});
+
+		// Increment user likes count
+		User.update({ _id: user._id }, {
+			$inc: {
+				likes_count: 1
+			}
+		});
+
+		// Increment user liked count
+		User.update({ _id: post.user_id }, {
+			$inc: {
+				liked_count: 1
+			}
+		});
+
+		// Notify
+		notify(post.user_id, user._id, 'like', {
+			post_id: post._id
+		});
 	});
-});
diff --git a/src/api/endpoints/posts/likes/delete.js b/src/api/endpoints/posts/likes/delete.js
index e3dee23bf..c2b8f5337 100644
--- a/src/api/endpoints/posts/likes/delete.js
+++ b/src/api/endpoints/posts/likes/delete.js
@@ -17,69 +17,68 @@ import User from '../../../models/user';
  * @return {Promise<object>}
  */
 module.exports = (params, user) =>
-	new Promise(async (res, rej) =>
-{
-	// Get 'post_id' parameter
-	let postId = params.post_id;
-	if (postId === undefined || postId === null) {
-		return rej('post_id is required');
-	}
-
-	// Validate id
-	if (!mongo.ObjectID.isValid(postId)) {
-		return rej('incorrect post_id');
-	}
-
-	// Get likee
-	const post = await Post.findOne({
-		_id: new mongo.ObjectID(postId)
-	});
-
-	if (post === null) {
-		return rej('post not found');
-	}
-
-	// Check arleady liked
-	const exist = await Like.findOne({
-		post_id: post._id,
-		user_id: user._id,
-		deleted_at: { $exists: false }
-	});
-
-	if (exist === null) {
-		return rej('already not liked');
-	}
-
-	// Delete like
-	await Like.update({
-		_id: exist._id
-	}, {
-		$set: {
-			deleted_at: new Date()
+	new Promise(async (res, rej) => {
+		// Get 'post_id' parameter
+		let postId = params.post_id;
+		if (postId === undefined || postId === null) {
+			return rej('post_id is required');
 		}
-	});
 
-	// Send response
-	res();
-
-	// Decrement likes count
-	Post.update({ _id: post._id }, {
-		$inc: {
-			likes_count: -1
+		// Validate id
+		if (!mongo.ObjectID.isValid(postId)) {
+			return rej('incorrect post_id');
 		}
-	});
 
-	// Decrement user likes count
-	User.update({ _id: user._id }, {
-		$inc: {
-			likes_count: -1
-		}
-	});
+		// Get likee
+		const post = await Post.findOne({
+			_id: new mongo.ObjectID(postId)
+		});
 
-	// Decrement user liked count
-	User.update({ _id: post.user_id }, {
-		$inc: {
-			liked_count: -1
+		if (post === null) {
+			return rej('post not found');
 		}
+
+		// Check arleady liked
+		const exist = await Like.findOne({
+			post_id: post._id,
+			user_id: user._id,
+			deleted_at: { $exists: false }
+		});
+
+		if (exist === null) {
+			return rej('already not liked');
+		}
+
+		// Delete like
+		await Like.update({
+			_id: exist._id
+		}, {
+				$set: {
+					deleted_at: new Date()
+				}
+			});
+
+		// Send response
+		res();
+
+		// Decrement likes count
+		Post.update({ _id: post._id }, {
+			$inc: {
+				likes_count: -1
+			}
+		});
+
+		// Decrement user likes count
+		User.update({ _id: user._id }, {
+			$inc: {
+				likes_count: -1
+			}
+		});
+
+		// Decrement user liked count
+		User.update({ _id: post.user_id }, {
+			$inc: {
+				liked_count: -1
+			}
+		});
 	});
-});
diff --git a/src/api/endpoints/posts/polls/vote.js b/src/api/endpoints/posts/polls/vote.js
index f1842069d..40cd8a7e2 100644
--- a/src/api/endpoints/posts/polls/vote.js
+++ b/src/api/endpoints/posts/polls/vote.js
@@ -16,84 +16,83 @@ import notify from '../../../common/notify';
  * @return {Promise<object>}
  */
 module.exports = (params, user) =>
-	new Promise(async (res, rej) =>
-{
-	// Get 'post_id' parameter
-	const postId = params.post_id;
-	if (postId === undefined || postId === null) {
-		return rej('post_id is required');
-	}
+	new Promise(async (res, rej) => {
+		// Get 'post_id' parameter
+		const postId = params.post_id;
+		if (postId === undefined || postId === null) {
+			return rej('post_id is required');
+		}
 
-	// Validate id
-	if (!mongo.ObjectID.isValid(postId)) {
-		return rej('incorrect post_id');
-	}
+		// Validate id
+		if (!mongo.ObjectID.isValid(postId)) {
+			return rej('incorrect post_id');
+		}
 
-	// Get votee
-	const post = await Post.findOne({
-		_id: new mongo.ObjectID(postId)
+		// Get votee
+		const post = await Post.findOne({
+			_id: new mongo.ObjectID(postId)
+		});
+
+		if (post === null) {
+			return rej('post not found');
+		}
+
+		if (post.poll == null) {
+			return rej('poll not found');
+		}
+
+		// Get 'choice' parameter
+		const choice = params.choice;
+		if (choice == null) {
+			return rej('choice is required');
+		}
+
+		// Validate choice
+		if (!post.poll.choices.some(x => x.id == choice)) {
+			return rej('invalid choice');
+		}
+
+		// Check arleady voted
+		const exist = await Vote.findOne({
+			post_id: post._id,
+			user_id: user._id
+		});
+
+		if (exist !== null) {
+			return rej('already voted');
+		}
+
+		// Create vote
+		await Vote.insert({
+			created_at: new Date(),
+			post_id: post._id,
+			user_id: user._id,
+			choice: choice
+		});
+
+		// Send response
+		res();
+
+		const inc = {};
+		inc[`poll.choices.${findWithAttr(post.poll.choices, 'id', choice)}.votes`] = 1;
+
+		console.log(inc);
+
+		// Increment likes count
+		Post.update({ _id: post._id }, {
+			$inc: inc
+		});
+
+		// Notify
+		notify(post.user_id, user._id, 'poll_vote', {
+			post_id: post._id,
+			choice: choice
+		});
 	});
 
-	if (post === null) {
-		return rej('post not found');
-	}
-
-	if (post.poll == null) {
-		return rej('poll not found');
-	}
-
-	// Get 'choice' parameter
-	const choice = params.choice;
-	if (choice == null) {
-		return rej('choice is required');
-	}
-
-	// Validate choice
-	if (!post.poll.choices.some(x => x.id == choice)) {
-		return rej('invalid choice');
-	}
-
-	// Check arleady voted
-	const exist = await Vote.findOne({
-		post_id: post._id,
-		user_id: user._id
-	});
-
-	if (exist !== null) {
-		return rej('already voted');
-	}
-
-	// Create vote
-	await Vote.insert({
-		created_at: new Date(),
-		post_id: post._id,
-		user_id: user._id,
-		choice: choice
-	});
-
-	// Send response
-	res();
-
-	const inc = {};
-	inc[`poll.choices.${ findWithAttr(post.poll.choices, 'id', choice) }.votes`] = 1;
-
-	console.log(inc);
-
-	// Increment likes count
-	Post.update({ _id: post._id }, {
-		$inc: inc
-	});
-
-	// Notify
-	notify(post.user_id, user._id, 'poll_vote', {
-		post_id: post._id,
-		choice: choice
-	});
-});
-
 function findWithAttr(array, attr, value) {
 	for (let i = 0; i < array.length; i += 1) {
-		if(array[i][attr] === value) {
+		if (array[i][attr] === value) {
 			return i;
 		}
 	}