diff --git a/package.json b/package.json
index eb20f5fa4d..a9a4d0e617 100644
--- a/package.json
+++ b/package.json
@@ -7,6 +7,21 @@
 		"doc": "docs"
 	},
 	"xo": {
+		"ignores": [
+			"./phpbb/adm/style/admin.js",
+			"./phpbb/adm/style/ajax.js",
+			"./phpbb/adm/style/permissions.js",
+			"./phpbb/adm/style/tooltip.js",
+			"./phpbb/assets/cookieconsent/*.js",
+			"./phpbb/assets/javascript/core.js",
+			"./phpbb/assets/javascript/editor.js",
+			"./phpbb/assets/javascript/installer.js",
+			"./phpbb/assets/javascript/plupload.js",
+			"./phpbb/assets/javascript/jquery*.js",
+			"./phpbb/assets/plupload/*.js",
+			"./phpbb/styles/prosilver/template/ajax.js",
+			"./phpbb/styles/prosilver/template/forum_fn.js"
+		],
 		"rules": {
 			"quotes": [
 				"error",
@@ -25,14 +40,14 @@
 				"error",
 				"always"
 			],
-			"multiline-comment-style": "off",
-			"computed-property-spacing": "off",
-			"space-in-parens": "off",
-			"capitalized-comments": "off",
 			"object-curly-spacing": [
 				"error",
 				"always"
 			],
+			"multiline-comment-style": "off",
+			"computed-property-spacing": "off",
+			"space-in-parens": "off",
+			"capitalized-comments": "off",
 			"no-lonely-if": "off"
 		},
 		"env": [
diff --git a/phpBB/adm/style/admin.js b/phpBB/adm/style/admin.js
index 5fdd07356c..948987fddb 100644
--- a/phpBB/adm/style/admin.js
+++ b/phpBB/adm/style/admin.js
@@ -1,3 +1,5 @@
+/* global phpbb */
+
 /**
 * phpBB3 ACP functions
 */
diff --git a/phpBB/adm/style/permissions.js b/phpBB/adm/style/permissions.js
index dc9951a7a2..04b3fc5c5f 100644
--- a/phpBB/adm/style/permissions.js
+++ b/phpBB/adm/style/permissions.js
@@ -1,3 +1,5 @@
+/* global phpbb */
+
 /**
 * Hide and show all checkboxes
 * status = true (show boxes), false (hide boxes)
diff --git a/phpBB/adm/style/timezone.js b/phpBB/adm/style/timezone.js
index b5e27c907c..9959ecce92 100644
--- a/phpBB/adm/style/timezone.js
+++ b/phpBB/adm/style/timezone.js
@@ -1,13 +1,13 @@
-(function($) { // Avoid conflicts with other libraries
+/* global phpbb */
 
-"use strict";
+(function ($) { // Avoid conflicts with other libraries
+	'use strict';
 
-$('#tz_date').change(function() {
-	phpbb.timezoneSwitchDate(false);
-});
-
-$(document).ready(
-	phpbb.timezoneEnableDateSelection
-);
+	$('#tz_date').change(() => {
+		phpbb.timezoneSwitchDate(false);
+	});
 
+	$(document).ready(
+		phpbb.timezoneEnableDateSelection,
+	);
 })(jQuery); // Avoid conflicts with other libraries
diff --git a/phpBB/adm/style/tooltip.js b/phpBB/adm/style/tooltip.js
index 9afd398e00..562bc99dc3 100644
--- a/phpBB/adm/style/tooltip.js
+++ b/phpBB/adm/style/tooltip.js
@@ -1,3 +1,5 @@
+/* global phpbb */
+
 /*
 javascript for Bubble Tooltips by Alessandro Fulciniti
 - http://pro.html.it - http://web-graphics.com
diff --git a/phpBB/assets/javascript/editor.js b/phpBB/assets/javascript/editor.js
index 24cbc09f58..94063c2766 100644
--- a/phpBB/assets/javascript/editor.js
+++ b/phpBB/assets/javascript/editor.js
@@ -1,3 +1,5 @@
+/* global phpbb */
+
 /**
 * bbCode control by subBlue design [ www.subBlue.com ]
 * Includes unixsafe colour palette selector by SHS`
diff --git a/phpBB/styles/prosilver/template/timezone.js b/phpBB/styles/prosilver/template/timezone.js
index 44ec1b0979..97d5034d19 100644
--- a/phpBB/styles/prosilver/template/timezone.js
+++ b/phpBB/styles/prosilver/template/timezone.js
@@ -1,20 +1,18 @@
 /* global phpbb */
 
-(function($) { // Avoid conflicts with other libraries
+(function ($) { // Avoid conflicts with other libraries
+	'use strict';
 
-'use strict';
+	$('#tz_date').change(() => {
+		phpbb.timezoneSwitchDate(false);
+	});
 
-$('#tz_date').change(function() {
-	phpbb.timezoneSwitchDate(false);
-});
-
-$('#tz_select_date_suggest').click(function(){
-	phpbb.timezonePreselectSelect(true);
-});
-
-$(function () {
-	phpbb.timezoneEnableDateSelection();
-	phpbb.timezonePreselectSelect($('#tz_select_date_suggest').attr('timezone-preselect') === 'true');
-});
+	$('#tz_select_date_suggest').click(() => {
+		phpbb.timezonePreselectSelect(true);
+	});
 
+	$(() => {
+		phpbb.timezoneEnableDateSelection();
+		phpbb.timezonePreselectSelect($('#tz_select_date_suggest').attr('timezone-preselect') === 'true');
+	});
 })(jQuery); // Avoid conflicts with other libraries