diff --git a/lib/models/actions.js b/lib/models/actions.js
index ebad85fd..e504d210 100644
--- a/lib/models/actions.js
+++ b/lib/models/actions.js
@@ -51,7 +51,7 @@ function errorsAction(event) {
 
 function validateAction(axn) {
     var axnArr, axnElem, i;
-    if (util.isArray(axn)) {
+    if (Array.isArray(axn)) {
         axnArr = axn;
     } else {
         axnArr = [axn];
@@ -241,7 +241,7 @@ function DoAction(event, callback) {
         if (err) {
             return callback(err, null);
         }
-        if (!util.isArray(actions)) {
+        if (!Array.isArray(actions)) {
             actions = [actions];
         }
         // check all axns are right
diff --git a/lib/models/notices.js b/lib/models/notices.js
index ea306c40..86c7de62 100644
--- a/lib/models/notices.js
+++ b/lib/models/notices.js
@@ -158,7 +158,7 @@ function DoNotice(orionN, callback) {
         orionResponse = orionN.contextResponses;
     }
 
-    if (!util.isArray(orionResponse)) {
+    if (!Array.isArray(orionResponse)) {
         if (orionN.version === 2) {
             return callback(new errors.InvalidV2Notice('data must be an array, not a ' + typeof orionResponse));
         }
diff --git a/lib/models/rulesStore.js b/lib/models/rulesStore.js
index c64c5482..d8a2c26d 100644
--- a/lib/models/rulesStore.js
+++ b/lib/models/rulesStore.js
@@ -107,7 +107,7 @@ function findAll(service, subservice, callback) {
         }
         const col = db.collection(rulesCollectionName);
         col.find(criterion).toArray(function(err, rules) {
-            if (rules && util.isArray(rules)) {
+            if (rules && Array.isArray(rules)) {
                 rules.forEach(function(r) {
                     parsePostAxnParams(r);
                 });
diff --git a/lib/myutils.js b/lib/myutils.js
index 1b98917b..3ad0da3e 100644
--- a/lib/myutils.js
+++ b/lib/myutils.js
@@ -262,7 +262,7 @@ function respondAux(resp, err, data, withCount, raw, withMetrics) {
     } else {
         // non-raw
         respObj = { error: errMsg, data: data };
-        if (withCount === true && data && util.isArray(data)) {
+        if (withCount === true && data && Array.isArray(data)) {
             respObj.count = data.length;
         }
     }
diff --git a/lib/routes/actionsController.js b/lib/routes/actionsController.js
index 6f764b2e..c26c5750 100644
--- a/lib/routes/actionsController.js
+++ b/lib/routes/actionsController.js
@@ -60,7 +60,7 @@ function PostAction(req, resp) {
             //There is no array yet for this correlator
             rulesWithCorr = recentAxn[correlator] = [];
         }
-        if (util.isArray(rulesWithCorr)) {
+        if (Array.isArray(rulesWithCorr)) {
             if (rulesWithCorr.length > config.maxRulesByCorr) {
                 errMsg = util.format(
                     'maximun number of rules executed with the same correlator (%s) reached with these rules [%j]' +
diff --git a/lib/routes/rulesController.js b/lib/routes/rulesController.js
index e54df19a..d669324d 100644
--- a/lib/routes/rulesController.js
+++ b/lib/routes/rulesController.js
@@ -27,7 +27,6 @@ var rules = require('../models/rules'),
     constants = require('../constants'),
     config = require('../../config'),
     logger = require('logops'),
-    util = require('util'),
     myutils = require('../myutils');
 
 function GetAllRules(req, resp) {
@@ -36,7 +35,7 @@ function GetAllRules(req, resp) {
     var count = req.query && req.query.options ? req.query.options === 'count' : true;
     logger.debug({}, 'getting all rules');
     rules.FindAll(req.service, req.subservice, function(err, data) {
-        if (util.isArray(data)) {
+        if (Array.isArray(data)) {
             resp.set(constants.TOTAL_COUNT_HEADER, data.length);
             data = data.splice(offset, limit);
             var dataPurged = [];
diff --git a/lib/routes/visualRulesController.js b/lib/routes/visualRulesController.js
index 4134b178..baf96a39 100644
--- a/lib/routes/visualRulesController.js
+++ b/lib/routes/visualRulesController.js
@@ -22,8 +22,7 @@
  */
 'use strict';
 
-var util = require('util'),
-    visualRules = require('../models/visualRules'),
+var visualRules = require('../models/visualRules'),
     metrics = require('../models/metrics'),
     config = require('../../config'),
     constants = require('../constants'),
@@ -36,7 +35,7 @@ function GetAllVR(req, resp) {
     var count = req.query && req.query.options ? req.query.options === 'count' : true;
     logger.debug({}, 'getting all Vrules ');
     visualRules.FindAll(req.service, req.subservice, function(err, data) {
-        if (!err && util.isArray(data)) {
+        if (!err && Array.isArray(data)) {
             data = data.map(function(e) {
                 delete e.subservice;
                 delete e.service;