diff --git a/dev/App/User.js b/dev/App/User.js
index f48a2dd6c..845ee6240 100644
--- a/dev/App/User.js
+++ b/dev/App/User.js
@@ -6,7 +6,6 @@ import {
 	noop,
 	trim,
 	log,
-	has,
 	isArray,
 	isUnd,
 	isNormal,
@@ -703,7 +702,7 @@ class AppUser extends AbstractApp {
 
 								if (data.Result.Flags) {
 									for (uid in data.Result.Flags) {
-										if (has(data.Result.Flags, uid)) {
+										if (Object.prototype.hasOwnProperty.call(data.Result.Flags, uid)) {
 											check = true;
 											const flags = data.Result.Flags[uid];
 											storeMessageFlagsToCacheByFolderAndUid(folderFromCache.fullNameRaw, uid.toString(), [
diff --git a/dev/Common/Translator.js b/dev/Common/Translator.js
index 8dfc67bd6..af18c2238 100644
--- a/dev/Common/Translator.js
+++ b/dev/Common/Translator.js
@@ -3,7 +3,7 @@ import _ from '_';
 import $ from '$';
 import ko from 'ko';
 import { Notification, UploadErrorCode } from 'Common/Enums';
-import { pInt, isUnd, isNull, has, microtime } from 'Common/Utils';
+import { pInt, isUnd, isNull, microtime } from 'Common/Utils';
 import { $html, $htmlCL } from 'Common/Globals';
 import { reload as momentorReload } from 'Common/Momentor';
 import { langLink } from 'Common/Links';
@@ -100,7 +100,7 @@ export function i18n(key, valueList, defaulValue) {
 
 	if (!isUnd(valueList) && !isNull(valueList)) {
 		for (valueName in valueList) {
-			if (has(valueList, valueName)) {
+			if (Object.prototype.hasOwnProperty.call(valueList, valueName)) {
 				result = result.replace('%' + valueName + '%', valueList[valueName]);
 			}
 		}
diff --git a/dev/Common/Utils.js b/dev/Common/Utils.js
index 10541c501..936f770be 100644
--- a/dev/Common/Utils.js
+++ b/dev/Common/Utils.js
@@ -15,12 +15,11 @@ const isObject = _.isObject;
 const isFunc = _.isFunction;
 const isUnd = _.isUndefined;
 const isNull = _.isNull;
-const has = _.has;
 const noop = () => {}; // eslint-disable-line no-empty-function
 const noopTrue = () => true;
 const noopFalse = () => false;
 
-export { trim, isArray, isObject, isFunc, isUnd, isNull, has, noop, noopTrue, noopFalse, jassl };
+export { trim, isArray, isObject, isFunc, isUnd, isNull, noop, noopTrue, noopFalse, jassl };
 
 /**
  * @param {Function} func