diff --git a/.eslintrc b/.eslintrc
index c7ae618ffa..6bb90758a6 100644
--- a/.eslintrc
+++ b/.eslintrc
@@ -43,6 +43,7 @@
 		}],
 		"no-else-return": [ "error", { "allowElseIf": true } ],
 		"operator-linebreak": [ "error", "after" ],
+		"arrow-parens": ["error", "as-needed"],
 
 		// ES6
 		"prefer-rest-params": "off",
diff --git a/install/package.json b/install/package.json
index 0720a79423..bc9f4ec6b2 100644
--- a/install/package.json
+++ b/install/package.json
@@ -135,7 +135,7 @@
         "@commitlint/config-angular": "8.1.0",
         "coveralls": "3.0.5",
         "eslint": "6.1.0",
-        "eslint-config-airbnb-base": "13.2.0",
+        "eslint-config-airbnb-base": "14.0.0",
         "eslint-plugin-import": "2.18.2",
         "grunt": "1.0.4",
         "grunt-contrib-watch": "1.1.0",
diff --git a/public/src/modules/translator.js b/public/src/modules/translator.js
index ae286fdc25..a861f8fc39 100644
--- a/public/src/modules/translator.js
+++ b/public/src/modules/translator.js
@@ -579,6 +579,7 @@
 		},
 
 		toggleTimeagoShorthand: function toggleTimeagoShorthand(callback) {
+			/* eslint "prefer-object-spread": "off" */
 			function toggle() {
 				var tmp = assign({}, jQuery.timeago.settings.strings);
 				jQuery.timeago.settings.strings = assign({}, adaptor.timeagoShort);
diff --git a/src/categories/index.js b/src/categories/index.js
index 7f2410efb5..395e0f1f56 100644
--- a/src/categories/index.js
+++ b/src/categories/index.js
@@ -146,7 +146,7 @@ Categories.getCategories = async function (cids, uid) {
 Categories.getTagWhitelist = async function (cids) {
 	const cachedData = {};
 
-	const nonCachedCids = cids.filter((cid) => {
+	const nonCachedCids = cids.filter(cid => {
 		const data = cache.get('cid:' + cid + ':tag:whitelist');
 		const isInCache = data !== undefined;
 		if (isInCache) {
diff --git a/src/categories/recentreplies.js b/src/categories/recentreplies.js
index 3e94cbf834..0c08c50b92 100644
--- a/src/categories/recentreplies.js
+++ b/src/categories/recentreplies.js
@@ -157,7 +157,7 @@ module.exports = function (Categories) {
 
 			const bulkRemove = [];
 			const bulkAdd = [];
-			postData.forEach((post) => {
+			postData.forEach(post => {
 				bulkRemove.push(['cid:' + oldCid + ':uid:' + post.uid + ':pids', post.pid]);
 				bulkRemove.push(['cid:' + oldCid + ':uid:' + post.uid + ':pids:votes', post.pid]);
 				bulkAdd.push(['cid:' + cid + ':uid:' + post.uid + ':pids', post.timestamp, post.pid]);
diff --git a/src/cli/package-install.js b/src/cli/package-install.js
index 7baaee2a2b..699a5962bd 100644
--- a/src/cli/package-install.js
+++ b/src/cli/package-install.js
@@ -20,9 +20,7 @@ function updatePackageFile() {
 	}
 
 	var defaultPackageContents = JSON.parse(fs.readFileSync(packageDefaultFilePath, 'utf8'));
-	var packageContents = Object.assign({}, oldPackageContents, defaultPackageContents, {
-		dependencies: Object.assign({}, oldPackageContents.dependencies, defaultPackageContents.dependencies),
-	});
+	var packageContents = { ...oldPackageContents, ...defaultPackageContents, dependencies: { ...oldPackageContents.dependencies, ...defaultPackageContents.dependencies } };
 
 	fs.writeFileSync(packageFilePath, JSON.stringify(packageContents, null, 2));
 }
diff --git a/src/controllers/accounts/helpers.js b/src/controllers/accounts/helpers.js
index 10414467e8..3975a5c914 100644
--- a/src/controllers/accounts/helpers.js
+++ b/src/controllers/accounts/helpers.js
@@ -197,13 +197,12 @@ function filterLinks(links, states) {
 		}
 
 		// Default visibility
-		link.visibility = Object.assign({
-			self: true,
+		link.visibility = { self: true,
 			other: true,
 			moderator: true,
 			globalMod: true,
 			admin: true,
-		}, link.visibility);
+			...link.visibility };
 
 		var permit = Object.keys(states).some(function (state) {
 			return states[state] && link.visibility[state];
diff --git a/src/controllers/authentication.js b/src/controllers/authentication.js
index 968209f7d0..1840b372f8 100644
--- a/src/controllers/authentication.js
+++ b/src/controllers/authentication.js
@@ -202,7 +202,7 @@ authenticationController.registerComplete = function (req, res, next) {
 				delete payload.uid;
 				delete payload.returnTo;
 
-				Object.keys(payload).forEach((prop) => {
+				Object.keys(payload).forEach(prop => {
 					if (typeof payload[prop] === 'boolean') {
 						payload[prop] = payload[prop] ? 1 : 0;
 					}
diff --git a/src/controllers/topics.js b/src/controllers/topics.js
index 155c4d14f4..71a62d7bfd 100644
--- a/src/controllers/topics.js
+++ b/src/controllers/topics.js
@@ -238,7 +238,7 @@ async function addTags(topicData, req, res) {
 
 async function addOGImageTags(res, topicData, postAtIndex) {
 	const uploads = postAtIndex ? await posts.uploads.listWithSizes(postAtIndex.pid) : [];
-	const images = uploads.map((upload) => {
+	const images = uploads.map(upload => {
 		upload.name = nconf.get('url') + nconf.get('upload_url') + '/files/' + upload.name;
 		return upload;
 	});
diff --git a/src/controllers/unread.js b/src/controllers/unread.js
index faafc50b83..710428dbc0 100644
--- a/src/controllers/unread.js
+++ b/src/controllers/unread.js
@@ -24,7 +24,7 @@ unreadController.get = function (req, res, next) {
 
 	async.waterfall([
 		function (next) {
-			plugins.fireHook('filter:unread.getValidFilters', { filters: Object.assign({}, helpers.validFilters) }, next);
+			plugins.fireHook('filter:unread.getValidFilters', { filters: { ...helpers.validFilters } }, next);
 		},
 		function (data, _next) {
 			if (!data.filters[filter]) {
@@ -98,7 +98,7 @@ unreadController.unreadTotal = function (req, res, next) {
 
 	async.waterfall([
 		function (next) {
-			plugins.fireHook('filter:unread.getValidFilters', { filters: Object.assign({}, helpers.validFilters) }, next);
+			plugins.fireHook('filter:unread.getValidFilters', { filters: { ...helpers.validFilters } }, next);
 		},
 		function (data, _next) {
 			if (!data.filters[filter]) {
diff --git a/src/database/index.js b/src/database/index.js
index 818efb4fe0..ae1f0e5446 100644
--- a/src/database/index.js
+++ b/src/database/index.js
@@ -12,7 +12,7 @@ if (!databaseName) {
 var primaryDB = require('./' + databaseName);
 
 primaryDB.parseIntFields = function (data, intFields, requestedFields) {
-	intFields.forEach((field) => {
+	intFields.forEach(field => {
 		if (!requestedFields.length || requestedFields.includes(field)) {
 			data[field] = parseInt(data[field], 10) || 0;
 		}
diff --git a/src/database/mongo/hash.js b/src/database/mongo/hash.js
index f9416d8206..9ffacbef31 100644
--- a/src/database/mongo/hash.js
+++ b/src/database/mongo/hash.js
@@ -86,7 +86,7 @@ module.exports = function (module) {
 
 				const item = cachedData[key] || {};
 				const result = {};
-				fields.forEach((field) => {
+				fields.forEach(field => {
 					result[field] = item[field] !== undefined ? item[field] : null;
 				});
 				return result;
diff --git a/src/database/redis/hash.js b/src/database/redis/hash.js
index 6dc2444283..8cb00b156f 100644
--- a/src/database/redis/hash.js
+++ b/src/database/redis/hash.js
@@ -117,7 +117,7 @@ module.exports = function (module) {
 
 			const item = cachedData[key] || {};
 			const result = {};
-			fields.forEach((field) => {
+			fields.forEach(field => {
 				result[field] = item[field] !== undefined ? item[field] : null;
 			});
 			return result;
diff --git a/src/database/redis/sorted.js b/src/database/redis/sorted.js
index 884d966df7..78077e1151 100644
--- a/src/database/redis/sorted.js
+++ b/src/database/redis/sorted.js
@@ -32,7 +32,7 @@ module.exports = function (module) {
 				return [];
 			}
 			const batch = module.client.batch();
-			key.forEach((key) => {
+			key.forEach(key => {
 				batch[method]([key, start, stop, 'WITHSCORES']);
 			});
 			let data = await helpers.execBatch(batch);
diff --git a/src/emailer.js b/src/emailer.js
index 996dab43ab..d8477a658b 100644
--- a/src/emailer.js
+++ b/src/emailer.js
@@ -194,7 +194,7 @@ Emailer.send = function (template, uid, params, callback) {
 	}
 
 	// Combined passed-in payload with default values
-	params = Object.assign({}, Emailer._defaultPayload, params);
+	params = { ...Emailer._defaultPayload, ...params };
 
 	async.waterfall([
 		function (next) {
@@ -228,10 +228,9 @@ Emailer.sendToEmail = function (template, email, language, params, callback) {
 	var lang = language || meta.config.defaultLang || 'en-GB';
 
 	// Add some default email headers based on local configuration
-	params.headers = Object.assign({
-		'List-Id': '<' + [template, params.uid, getHostname()].join('.') + '>',
+	params.headers = { 'List-Id': '<' + [template, params.uid, getHostname()].join('.') + '>',
 		'List-Unsubscribe': '<' + [nconf.get('url'), 'uid', params.uid, 'settings'].join('/') + '>',
-	}, params.headers);
+		...params.headers };
 
 	// Digests and notifications can be one-click unsubbed
 	let payload = {
diff --git a/src/flags.js b/src/flags.js
index eacfacf672..affb2ff440 100644
--- a/src/flags.js
+++ b/src/flags.js
@@ -93,17 +93,15 @@ Flags.get = function (flagId, callback) {
 				targetObj: async.apply(Flags.getTarget, data.base.type, data.base.targetId, 0),
 			}, function (err, payload) {
 				// Final object return construction
-				next(err, Object.assign({
-					state: 'open',
-				}, data.base, {
+				next(err, { state: 'open',
+					...data.base,
 					description: validator.escape(data.base.description),
 					datetimeISO: utils.toISOString(data.base.datetime),
 					target_readable: data.base.type.charAt(0).toUpperCase() + data.base.type.slice(1) + ' ' + data.base.targetId,
 					target: payload.targetObj,
 					history: data.history,
 					notes: data.notes,
-					reporter: payload.userObj,
-				}));
+					reporter: payload.userObj });
 			});
 		},
 		function (flagObj, next) {
@@ -181,16 +179,14 @@ Flags.list = function (filters, uid, callback) {
 					async.apply(db.getObject, 'flag:' + flagId),
 					function (flagObj, next) {
 						user.getUserFields(flagObj.uid, ['username', 'picture'], function (err, userObj) {
-							next(err, Object.assign({
-								state: 'open',
-							}, flagObj, {
+							next(err, { state: 'open',
+								...flagObj,
 								reporter: {
 									username: userObj.username,
 									picture: userObj.picture,
 									'icon:bgColor': userObj['icon:bgColor'],
 									'icon:text': userObj['icon:text'],
-								},
-							}));
+								} });
 						});
 					},
 				], function (err, flagObj) {
diff --git a/src/messaging/create.js b/src/messaging/create.js
index 7a126e1e60..6b83bee17e 100644
--- a/src/messaging/create.js
+++ b/src/messaging/create.js
@@ -6,7 +6,7 @@ var db = require('../database');
 var user = require('../user');
 
 module.exports = function (Messaging) {
-	Messaging.sendMessage = async (data) => {
+	Messaging.sendMessage = async data => {
 		await Messaging.checkContent(data.content);
 		const inRoom = await Messaging.isUserInRoom(data.uid, data.roomId);
 		if (!inRoom) {
@@ -16,7 +16,7 @@ module.exports = function (Messaging) {
 		return await Messaging.addMessage(data);
 	};
 
-	Messaging.checkContent = async (content) => {
+	Messaging.checkContent = async content => {
 		if (!content) {
 			throw new Error('[[error:invalid-chat-message]]');
 		}
@@ -32,7 +32,7 @@ module.exports = function (Messaging) {
 		}
 	};
 
-	Messaging.addMessage = async (data) => {
+	Messaging.addMessage = async data => {
 		const mid = await db.incrObjectField('global', 'nextMid');
 		const timestamp = data.timestamp || new Date().getTime();
 		let message = {
diff --git a/src/messaging/data.js b/src/messaging/data.js
index 982e51b746..54b891727f 100644
--- a/src/messaging/data.js
+++ b/src/messaging/data.js
@@ -77,7 +77,7 @@ module.exports = function (Messaging) {
 			message.system = !!message.system;
 		});
 
-		messages = await Promise.all(messages.map(async (message) => {
+		messages = await Promise.all(messages.map(async message => {
 			if (message.system) {
 				return message;
 			}
diff --git a/src/messaging/index.js b/src/messaging/index.js
index 2bcad1445b..1f1686de9b 100644
--- a/src/messaging/index.js
+++ b/src/messaging/index.js
@@ -20,7 +20,7 @@ require('./unread')(Messaging);
 require('./notifications')(Messaging);
 
 
-Messaging.getMessages = async (params) => {
+Messaging.getMessages = async params => {
 	const isNew = params.isNew || false;
 	const start = params.hasOwnProperty('start') ? params.start : 0;
 	const stop = parseInt(start, 10) + ((params.count || 50) - 1);
@@ -98,7 +98,7 @@ Messaging.getRecentChats = async (callerUid, uid, start, stop) => {
 	const results = await utils.promiseParallel({
 		roomData: Messaging.getRoomsData(roomIds),
 		unread: db.isSortedSetMembers('uid:' + uid + ':chat:rooms:unread', roomIds),
-		users: Promise.all(roomIds.map(async (roomId) => {
+		users: Promise.all(roomIds.map(async roomId => {
 			let uids = await db.getSortedSetRevRange('chat:room:' + roomId + ':uids', 0, 9);
 			uids = uids.filter(function (value) {
 				return value && parseInt(value, 10) !== parseInt(uid, 10);
diff --git a/src/messaging/rooms.js b/src/messaging/rooms.js
index ed5ae4ec6b..6d8cce1870 100644
--- a/src/messaging/rooms.js
+++ b/src/messaging/rooms.js
@@ -9,7 +9,7 @@ var privileges = require('../privileges');
 var meta = require('../meta');
 
 module.exports = function (Messaging) {
-	Messaging.getRoomData = async (roomId) => {
+	Messaging.getRoomData = async roomId => {
 		const data = await db.getObject('chat:room:' + roomId);
 		if (!data) {
 			throw new Error('[[error:no-chat-room]]');
@@ -19,7 +19,7 @@ module.exports = function (Messaging) {
 		return data;
 	};
 
-	Messaging.getRoomsData = async (roomIds) => {
+	Messaging.getRoomsData = async roomIds => {
 		const roomData = await db.getObjects(roomIds.map(function (roomId) {
 			return 'chat:room:' + roomId;
 		}));
diff --git a/src/messaging/unread.js b/src/messaging/unread.js
index 436b88d24c..7c202bddc6 100644
--- a/src/messaging/unread.js
+++ b/src/messaging/unread.js
@@ -4,7 +4,7 @@ var db = require('../database');
 var sockets = require('../socket.io');
 
 module.exports = function (Messaging) {
-	Messaging.getUnreadCount = async (uid) => {
+	Messaging.getUnreadCount = async uid => {
 		if (parseInt(uid, 10) <= 0) {
 			return 0;
 		}
@@ -12,7 +12,7 @@ module.exports = function (Messaging) {
 		return await db.sortedSetCard('uid:' + uid + ':chat:rooms:unread');
 	};
 
-	Messaging.pushUnreadCount = async (uid) => {
+	Messaging.pushUnreadCount = async uid => {
 		if (parseInt(uid, 10) <= 0) {
 			return;
 		}
diff --git a/src/meta/configs.js b/src/meta/configs.js
index 560ad79517..2568241163 100644
--- a/src/meta/configs.js
+++ b/src/meta/configs.js
@@ -72,7 +72,7 @@ Configs.getFields = async function (fields) {
 		values = await db.getObject('config');
 	}
 
-	values = Object.assign({}, defaults, values ? deserialize(values) : {});
+	values = { ...defaults, ...(values ? deserialize(values) : {}) };
 
 	if (!fields.length) {
 		values.version = nconf.get('version');
@@ -100,7 +100,7 @@ Configs.setMultiple = async function (data) {
 
 Configs.setOnEmpty = async function (values) {
 	const data = await db.getObject('config');
-	const config = Object.assign({}, values, data ? deserialize(data) : {});
+	const config = { ...values, ...(data ? deserialize(data) : {}) };
 	await db.setObject('config', config);
 };
 
diff --git a/src/meta/debugFork.js b/src/meta/debugFork.js
index 575eebd610..3ec746da10 100644
--- a/src/meta/debugFork.js
+++ b/src/meta/debugFork.js
@@ -30,9 +30,7 @@ function debugFork(modulePath, args, options) {
 	}
 
 	options = options || {};
-	options = Object.assign({}, options, {
-		execArgv: execArgv,
-	});
+	options = { ...options, execArgv: execArgv };
 
 	return fork(modulePath, args, options);
 }
diff --git a/src/meta/templates.js b/src/meta/templates.js
index 7397f6c9ea..358ffdb1bb 100644
--- a/src/meta/templates.js
+++ b/src/meta/templates.js
@@ -83,7 +83,7 @@ async function getTemplateDirs(activePlugins) {
 }
 
 async function getTemplateFiles(dirs) {
-	const buckets = await Promise.all(dirs.map(async (dir) => {
+	const buckets = await Promise.all(dirs.map(async dir => {
 		let files = await file.walk(dir);
 		files = files.filter(function (path) {
 			return path.endsWith('.tpl');
@@ -132,7 +132,7 @@ async function compile() {
 	files = await getTemplateDirs(files);
 	files = await getTemplateFiles(files);
 
-	await Promise.all(Object.keys(files).map(async (name) => {
+	await Promise.all(Object.keys(files).map(async name => {
 		const filePath = files[name];
 		let imported = await fsReadFile(filePath, 'utf8');
 		imported = await processImports(files, name, imported);
diff --git a/src/meta/themes.js b/src/meta/themes.js
index 9308b3d7fa..41ccdd333a 100644
--- a/src/meta/themes.js
+++ b/src/meta/themes.js
@@ -30,7 +30,7 @@ Themes.get = async () => {
 
 	let themes = await getThemes(themePath);
 	themes = _.flatten(themes).filter(Boolean);
-	themes = await Promise.all(themes.map(async (theme) => {
+	themes = await Promise.all(themes.map(async theme => {
 		const config = path.join(themePath, theme, 'theme.json');
 		try {
 			const file = await fsReadfile(config, 'utf8');
@@ -61,7 +61,7 @@ Themes.get = async () => {
 async function getThemes(themePath) {
 	let dirs = await fsReaddir(themePath);
 	dirs = dirs.filter(dir => themeNamePattern.test(dir) || dir.startsWith('@'));
-	return await Promise.all(dirs.map(async (dir) => {
+	return await Promise.all(dirs.map(async dir => {
 		try {
 			const dirpath = path.join(themePath, dir);
 			const stat = await fsStat(dirpath);
@@ -85,7 +85,7 @@ async function getThemes(themePath) {
 	}));
 }
 
-Themes.set = async (data) => {
+Themes.set = async data => {
 	const themeData = {
 		'theme:type': data.type,
 		'theme:id': data.id,
diff --git a/src/middleware/header.js b/src/middleware/header.js
index 3c14793b78..b723b009f5 100644
--- a/src/middleware/header.js
+++ b/src/middleware/header.js
@@ -238,7 +238,7 @@ module.exports = function (middleware) {
 			function (data, next) {
 				async.parallel({
 					scripts: async.apply(plugins.fireHook, 'filter:scripts.get', []),
-					timeagoLocale: (next) => {
+					timeagoLocale: next => {
 						async.waterfall([
 							async.apply(languages.listCodes),
 							(languageCodes, next) => {
diff --git a/src/plugins/hooks.js b/src/plugins/hooks.js
index 0adeadb8e9..260224aff8 100644
--- a/src/plugins/hooks.js
+++ b/src/plugins/hooks.js
@@ -54,7 +54,7 @@ module.exports = function (Plugins) {
 		if (Array.isArray(data.method) && data.method.every(method => typeof method === 'function' || typeof method === 'string')) {
 			// Go go gadget recursion!
 			data.method.forEach(function (method) {
-				const singularData = Object.assign({}, data, { method: method });
+				const singularData = { ...data, method: method };
 				Plugins.registerHook(id, singularData);
 			});
 		} else if (typeof data.method === 'string' && data.method.length > 0) {
@@ -157,7 +157,7 @@ module.exports = function (Plugins) {
 					next();
 				}, 5000);
 
-				const onError = (err) => {
+				const onError = err => {
 					winston.error('[plugins] Error executing \'' + hook + '\' in plugin \'' + hookObj.id + '\'');
 					winston.error(err);
 					clearTimeout(timeoutId);
diff --git a/src/plugins/load.js b/src/plugins/load.js
index 0da37acd27..9648e3168d 100644
--- a/src/plugins/load.js
+++ b/src/plugins/load.js
@@ -88,7 +88,7 @@ module.exports = function (Plugins) {
 		const fields = _.uniq(_.flatMap(targets, target => map[target] || []));
 
 		// clear old data before build
-		fields.forEach((field) => {
+		fields.forEach(field => {
 			switch (field) {
 			case 'clientScripts':
 			case 'acpScripts':
diff --git a/src/posts/uploads.js b/src/posts/uploads.js
index 8142f1b992..94fa9e36b0 100644
--- a/src/posts/uploads.js
+++ b/src/posts/uploads.js
@@ -108,7 +108,7 @@ module.exports = function (Posts) {
 		]);
 	};
 
-	Posts.uploads.saveSize = async (filePaths) => {
+	Posts.uploads.saveSize = async filePaths => {
 		await Promise.all(filePaths.map(async function (fileName) {
 			try {
 				const size = await image.size(path.join(pathPrefix, fileName));
diff --git a/src/posts/user.js b/src/posts/user.js
index 9205bed2f4..8db9c62947 100644
--- a/src/posts/user.js
+++ b/src/posts/user.js
@@ -207,7 +207,7 @@ module.exports = function (Posts) {
 		const bulkAdd = [];
 		const bulkRemove = [];
 		const postsByUser = {};
-		mainPosts.forEach((post) => {
+		mainPosts.forEach(post => {
 			bulkRemove.push(['cid:' + post.cid + ':uid:' + post.uid + ':tids', post.tid]);
 			bulkRemove.push(['uid:' + post.uid + ':topics', post.tid]);
 
diff --git a/src/prestart.js b/src/prestart.js
index 49f6336499..76190400c6 100644
--- a/src/prestart.js
+++ b/src/prestart.js
@@ -22,7 +22,7 @@ function setupWinston() {
 		formats.push(winston.format.timestamp());
 		formats.push(winston.format.json());
 	} else {
-		const timestampFormat = winston.format((info) => {
+		const timestampFormat = winston.format(info => {
 			var dateString = new Date().toISOString() + ' [' + nconf.get('port') + '/' + global.process.pid + ']';
 			info.level = dateString + ' - ' + info.level;
 			return info;
diff --git a/src/privileges/helpers.js b/src/privileges/helpers.js
index 81659d510d..cad087d6f5 100644
--- a/src/privileges/helpers.js
+++ b/src/privileges/helpers.js
@@ -148,8 +148,8 @@ helpers.giveOrRescind = async function (method, privileges, cids, groupNames) {
 	cids = Array.isArray(cids) ? cids : [cids];
 	for (const groupName of groupNames) {
 		const groupKeys = [];
-		cids.forEach((cid) => {
-			privileges.forEach((privilege) => {
+		cids.forEach(cid => {
+			privileges.forEach(privilege => {
 				groupKeys.push('cid:' + cid + ':privileges:groups:' + privilege);
 			});
 		});
diff --git a/src/socket.io/modules.js b/src/socket.io/modules.js
index 1589fe1dad..c64b31cabc 100644
--- a/src/socket.io/modules.js
+++ b/src/socket.io/modules.js
@@ -166,7 +166,7 @@ SocketModules.chats.getUsersInRoom = function (socket, data, callback) {
 			return callback(err);
 		}
 
-		payload.users = payload.users.map((user) => {
+		payload.users = payload.users.map(user => {
 			user.canKick = (parseInt(user.uid, 10) !== parseInt(socket.uid, 10)) && payload.isOwner;
 			return user;
 		});
diff --git a/src/topics/follow.js b/src/topics/follow.js
index 957e97a6de..0c3ed1145b 100644
--- a/src/topics/follow.js
+++ b/src/topics/follow.js
@@ -90,7 +90,7 @@ module.exports = function (Topics) {
 			return tids.map(() => ({ following: false, ignoring: false }));
 		}
 		const keys = [];
-		tids.forEach((tid) => {
+		tids.forEach(tid => {
 			keys.push('tid:' + tid + ':followers', 'tid:' + tid + ':ignorers');
 		});
 
diff --git a/src/user/blocks.js b/src/user/blocks.js
index c8fd75ed95..1466610360 100644
--- a/src/user/blocks.js
+++ b/src/user/blocks.js
@@ -98,7 +98,7 @@ module.exports = function (User) {
 			property = 'uid';
 		}
 
-		if (!Array.isArray(set) || !set.length || !set.every((item) => {
+		if (!Array.isArray(set) || !set.length || !set.every(item => {
 			if (!item) {
 				return false;
 			}
diff --git a/src/user/invite.js b/src/user/invite.js
index 1ad7acd467..8b742263b6 100644
--- a/src/user/invite.js
+++ b/src/user/invite.js
@@ -64,7 +64,7 @@ module.exports = function (User) {
 		};
 
 		// Append default data to this email payload
-		data = Object.assign({}, emailer._defaultPayload, data);
+		data = { ...emailer._defaultPayload, ...data };
 
 		await emailer.sendToEmail('invitation', email, meta.config.defaultLang, data);
 	};