diff --git a/packages/rocketchat-slashcommands-mute/client/mute.coffee b/packages/rocketchat-slashcommands-mute/client/mute.coffee
deleted file mode 100644
index c7c62f28f576..000000000000
--- a/packages/rocketchat-slashcommands-mute/client/mute.coffee
+++ /dev/null
@@ -1,3 +0,0 @@
-RocketChat.slashCommands.add 'mute', null,
-	description: 'Mute_someone_in_room'
-	params: '@username'
diff --git a/packages/rocketchat-slashcommands-mute/client/mute.js b/packages/rocketchat-slashcommands-mute/client/mute.js
new file mode 100644
index 000000000000..14735ce70ae9
--- /dev/null
+++ b/packages/rocketchat-slashcommands-mute/client/mute.js
@@ -0,0 +1,4 @@
+RocketChat.slashCommands.add('mute', undefined, {
+	description: 'Mute_someone_in_room',
+	params: '@username'
+});
diff --git a/packages/rocketchat-slashcommands-mute/client/unmute.coffee b/packages/rocketchat-slashcommands-mute/client/unmute.coffee
deleted file mode 100644
index 18b417f298d5..000000000000
--- a/packages/rocketchat-slashcommands-mute/client/unmute.coffee
+++ /dev/null
@@ -1,3 +0,0 @@
-RocketChat.slashCommands.add 'unmute', null,
-	description: 'Unmute_someone_in_room'
-	params: '@username'
diff --git a/packages/rocketchat-slashcommands-mute/client/unmute.js b/packages/rocketchat-slashcommands-mute/client/unmute.js
new file mode 100644
index 000000000000..447e02cec79b
--- /dev/null
+++ b/packages/rocketchat-slashcommands-mute/client/unmute.js
@@ -0,0 +1,4 @@
+RocketChat.slashCommands.add('unmute', undefined, {
+	description: 'Unmute_someone_in_room',
+	params: '@username'
+});
diff --git a/packages/rocketchat-slashcommands-mute/package.js b/packages/rocketchat-slashcommands-mute/package.js
index af1bc9a816b3..aee8058a6f7b 100644
--- a/packages/rocketchat-slashcommands-mute/package.js
+++ b/packages/rocketchat-slashcommands-mute/package.js
@@ -9,15 +9,14 @@ Package.onUse(function(api) {
 
 	api.use([
 		'ecmascript',
-		'coffeescript',
 		'check',
 		'rocketchat:lib'
 	]);
 
 	api.use('templating', 'client');
 
-	api.addFiles('client/mute.coffee', 'client');
-	api.addFiles('client/unmute.coffee', 'client');
-	api.addFiles('server/mute.coffee', 'server');
-	api.addFiles('server/unmute.coffee', 'server');
+	api.addFiles('client/mute.js', 'client');
+	api.addFiles('client/unmute.js', 'client');
+	api.addFiles('server/mute.js', 'server');
+	api.addFiles('server/unmute.js', 'server');
 });
diff --git a/packages/rocketchat-slashcommands-mute/server/mute.coffee b/packages/rocketchat-slashcommands-mute/server/mute.coffee
deleted file mode 100644
index d8bc3d3bc513..000000000000
--- a/packages/rocketchat-slashcommands-mute/server/mute.coffee
+++ /dev/null
@@ -1,40 +0,0 @@
-###
-# Mute is a named function that will replace /mute commands
-###
-
-class Mute
-	constructor: (command, params, item) ->
-		if command isnt 'mute' or not Match.test params, String
-			return
-
-		username = params.trim()
-		if username is ''
-			return
-
-		username = username.replace('@', '')
-
-		user = Meteor.users.findOne Meteor.userId()
-		mutedUser = RocketChat.models.Users.findOneByUsername username
-		room = RocketChat.models.Rooms.findOneById item.rid
-
-		if not mutedUser?
-			RocketChat.Notifications.notifyUser Meteor.userId(), 'message', {
-				_id: Random.id()
-				rid: item.rid
-				ts: new Date
-				msg: TAPi18n.__('Username_doesnt_exist', { postProcess: 'sprintf', sprintf: [ username ] }, user.language);
-			}
-			return
-
-		if username not in (room.usernames or [])
-			RocketChat.Notifications.notifyUser Meteor.userId(), 'message', {
-				_id: Random.id()
-				rid: item.rid
-				ts: new Date
-				msg: TAPi18n.__('Username_is_not_in_this_room', { postProcess: 'sprintf', sprintf: [ username ] }, user.language);
-			}
-			return
-
-		Meteor.call 'muteUserInRoom', { rid: item.rid, username: username }
-
-RocketChat.slashCommands.add 'mute', Mute
diff --git a/packages/rocketchat-slashcommands-mute/server/mute.js b/packages/rocketchat-slashcommands-mute/server/mute.js
new file mode 100644
index 000000000000..38273ff18fee
--- /dev/null
+++ b/packages/rocketchat-slashcommands-mute/server/mute.js
@@ -0,0 +1,45 @@
+
+/*
+* Mute is a named function that will replace /mute commands
+*/
+
+RocketChat.slashCommands.add('mute', function Mute(command, params, item) {
+	if (command !== 'mute' || !Match.test(params, String)) {
+		return;
+	}
+	const username = params.trim().replace('@', '');
+	if (username === '') {
+		return;
+	}
+	const user = Meteor.users.findOne(Meteor.userId());
+	const mutedUser = RocketChat.models.Users.findOneByUsername(username);
+	const room = RocketChat.models.Rooms.findOneById(item.rid);
+	if (mutedUser == null) {
+		RocketChat.Notifications.notifyUser(Meteor.userId(), 'message', {
+			_id: Random.id(),
+			rid: item.rid,
+			ts: new Date,
+			msg: TAPi18n.__('Username_doesnt_exist', {
+				postProcess: 'sprintf',
+				sprintf: [username]
+			}, user.language)
+		});
+		return;
+	}
+	if ((room.usernames || []).includes(username)) {
+		RocketChat.Notifications.notifyUser(Meteor.userId(), 'message', {
+			_id: Random.id(),
+			rid: item.rid,
+			ts: new Date,
+			msg: TAPi18n.__('Username_is_not_in_this_room', {
+				postProcess: 'sprintf',
+				sprintf: [username]
+			}, user.language)
+		});
+		return;
+	}
+	Meteor.call('muteUserInRoom', {
+		rid: item.rid,
+		username
+	});
+});
diff --git a/packages/rocketchat-slashcommands-mute/server/unmute.coffee b/packages/rocketchat-slashcommands-mute/server/unmute.coffee
deleted file mode 100644
index e3b6ee25d82d..000000000000
--- a/packages/rocketchat-slashcommands-mute/server/unmute.coffee
+++ /dev/null
@@ -1,40 +0,0 @@
-###
-# Unmute is a named function that will replace /unmute commands
-###
-
-class Unmute
-	constructor: (command, params, item) ->
-		if command isnt 'unmute' or not Match.test params, String
-			return
-
-		username = params.trim()
-		if username is ''
-			return
-
-		username = username.replace('@', '')
-
-		user = Meteor.users.findOne Meteor.userId()
-		unmutedUser = RocketChat.models.Users.findOneByUsername username
-		room = RocketChat.models.Rooms.findOneById item.rid
-
-		if not unmutedUser?
-			RocketChat.Notifications.notifyUser Meteor.userId(), 'message', {
-				_id: Random.id()
-				rid: item.rid
-				ts: new Date
-				msg: TAPi18n.__('Username_doesnt_exist', { postProcess: 'sprintf', sprintf: [ username ] }, user.language);
-			}
-			return
-
-		if username not in (room.usernames or [])
-			RocketChat.Notifications.notifyUser Meteor.userId(), 'message', {
-				_id: Random.id()
-				rid: item.rid
-				ts: new Date
-				msg: TAPi18n.__('Username_is_not_in_this_room', { postProcess: 'sprintf', sprintf: [ username ] }, user.language);
-			}
-			return
-
-		Meteor.call 'unmuteUserInRoom', { rid: item.rid, username: username }
-
-RocketChat.slashCommands.add 'unmute', Unmute
diff --git a/packages/rocketchat-slashcommands-mute/server/unmute.js b/packages/rocketchat-slashcommands-mute/server/unmute.js
new file mode 100644
index 000000000000..c5a3f02cfa10
--- /dev/null
+++ b/packages/rocketchat-slashcommands-mute/server/unmute.js
@@ -0,0 +1,44 @@
+
+/*
+* Unmute is a named function that will replace /unmute commands
+*/
+
+RocketChat.slashCommands.add('unmute', function Unmute(command, params, item) {
+
+	if (command !== 'unmute' || !Match.test(params, String)) {
+		return;
+	}
+	const username = params.trim().replace('@', '');
+	if (username === '') {
+		return;
+	}
+	const user = Meteor.users.findOne(Meteor.userId());
+	const unmutedUser = RocketChat.models.Users.findOneByUsername(username);
+	const room = RocketChat.models.Rooms.findOneById(item.rid);
+	if (unmutedUser == null) {
+		return RocketChat.Notifications.notifyUser(Meteor.userId(), 'message', {
+			_id: Random.id(),
+			rid: item.rid,
+			ts: new Date,
+			msg: TAPi18n.__('Username_doesnt_exist', {
+				postProcess: 'sprintf',
+				sprintf: [username]
+			}, user.language)
+		});
+	}
+	if ((room.usernames || []).includes(username)) {
+		return RocketChat.Notifications.notifyUser(Meteor.userId(), 'message', {
+			_id: Random.id(),
+			rid: item.rid,
+			ts: new Date,
+			msg: TAPi18n.__('Username_is_not_in_this_room', {
+				postProcess: 'sprintf',
+				sprintf: [username]
+			}, user.language)
+		});
+	}
+	Meteor.call('unmuteUserInRoom', {
+		rid: item.rid,
+		username
+	});
+});