diff --git a/gui/app/components/document/settings-meta.js b/gui/app/components/document/settings-meta.js
index 71047034..f3104479 100644
--- a/gui/app/components/document/settings-meta.js
+++ b/gui/app/components/document/settings-meta.js
@@ -147,15 +147,15 @@ export default Component.extend(Notifier, {
 			let tag3 = this.get("tag3").toLowerCase().trim();
 			let save = "#";
 
-			if (tag1.startsWith('-')) {
+			if (is.startWith(tag1, '-')) {
 				$('#add-tag-field1').addClass('is-invalid');
 				return;
 			}
-			if (tag2.startsWith('-')) {
+			if (is.startWith(tag2, '-')) {
 				$('#add-tag-field2').addClass('is-invalid');
 				return;
 			}
-			if (tag3.startsWith('-')) {
+			if (is.startWith(tag3, '-')) {
 				$('#add-tag-field3').addClass('is-invalid');
 				return;
 			}
diff --git a/gui/app/services/ajax.js b/gui/app/services/ajax.js
index c260a66f..e43715d4 100644
--- a/gui/app/services/ajax.js
+++ b/gui/app/services/ajax.js
@@ -39,7 +39,7 @@ export default AjaxService.extend({
 			let appVersion = headers['x-documize-version'];
 
 			// when unauthorized on local API AJAX calls, redirect to app root
-			if (status === 401 && is.not.undefined(appVersion) && is.not.includes(window.location.href, '/auth')) {
+			if (status === 401 && is.not.undefined(appVersion) && is.not.include(window.location.href, '/auth')) {
 				this.get('localStorage').clearAll();
 				window.location.href = 'auth/login';
 			}
diff --git a/gui/config/environment.js b/gui/config/environment.js
index 13de472a..8fbe66cf 100644
--- a/gui/config/environment.js
+++ b/gui/config/environment.js
@@ -12,7 +12,6 @@
 /* jshint node: true */
 
 module.exports = function (environment) {
-
 	var ENV = {
 		modulePrefix: 'documize',
 		podModulePrefix: 'documize/pods',
@@ -94,7 +93,7 @@ module.exports = function (environment) {
 
 	process.argv.forEach(function (element) {
 		if (element !== undefined) {
-			if (element.startsWith("apiHost=")) {
+			if (element.indexOf('apiHost=') === 0) {
 				element = element.replace("apiHost=", "");
 				ENV.apiHost = element;
 			}