diff --git a/submodules/groups/groups.js b/submodules/groups/groups.js
index dd6b872..c0b1f7e 100644
--- a/submodules/groups/groups.js
+++ b/submodules/groups/groups.js
@@ -35,7 +35,7 @@ define(function(require){
 					monster.ui.alert('error', self.i18n.active().groups.outdatedGroupsError);
 				} else {
 					var dataTemplate = self.groupsFormatListData(data),
-						template = $(monster.template(self, 'groups-layout', { countGroups: Object.keys(dataTemplate.groups).length })),
+						template = $(monster.template(self, 'groups-layout', { countGroups: _.size(dataTemplate.groups) })),
 						templateGroup;
 
 					_.each(dataTemplate.groups, function(group) {
diff --git a/submodules/strategy/strategy.js b/submodules/strategy/strategy.js
index b6ed201..cb523af 100644
--- a/submodules/strategy/strategy.js
+++ b/submodules/strategy/strategy.js
@@ -754,7 +754,7 @@ define(function(require){
 					searchType: $(this).data('type'),
 					callbacks: {
 						success: function(numbers) {
-							addNumbersToMainCallflow(Object.keys(numbers));
+							addNumbersToMainCallflow(_.keys(numbers));
 							toastr.success(self.i18n.active().strategy.toastrMessages.buyNumbersSuccess);
 						},
 						error: function(error) {
@@ -1097,7 +1097,7 @@ define(function(require){
 					searchType: $(this).data('type'),
 					callbacks: {
 						success: function(numbers) {
-							addNumbersToMainConference(Object.keys(numbers));
+							addNumbersToMainConference(_.keys(numbers));
 							toastr.success(self.i18n.active().strategy.toastrMessages.buyNumbersSuccess);
 						},
 						error: function(error) {
@@ -1236,7 +1236,7 @@ define(function(require){
 					singleSelect: true,
 					callbacks: {
 						success: function(numbers) {
-							addNumbersToMainFaxing(Object.keys(numbers));
+							addNumbersToMainFaxing(_.keys(numbers));
 							toastr.success(self.i18n.active().strategy.toastrMessages.buyNumbersSuccess);
 						},
 						error: function(error) {
@@ -1826,7 +1826,7 @@ define(function(require){
 				type = $this.data('type'),
 				holidayRule = {};
 
-			if(!name || Object.keys(rules).indexOf(name) >= 0) {
+			if(!name || _.keys(rules).indexOf(name) >= 0) {
 				holidayRule = false;
 			}
 			else if(toMonth && month !== toMonth) {
diff --git a/submodules/users/users.js b/submodules/users/users.js
index 275e653..273f674 100644
--- a/submodules/users/users.js
+++ b/submodules/users/users.js
@@ -1012,7 +1012,7 @@ define(function(require){
 				template.find('.detail-devices .list-assigned-items .item-row:not(.assigned)').each(function(k, row) {
 					dataDevices.new.push($(row).data('id'));
 				});
-				dataDevices.old = Object.keys(unassignedDevices);
+				dataDevices.old = _.keys(unassignedDevices);
 
 				self.usersUpdateDevices(dataDevices, userId, function() {
 					toastr.success(monster.template(self, '!' + toastrMessages.devicesUpdated, { name: name }));
@@ -1683,7 +1683,7 @@ define(function(require){
 				globalAddNumberCallback: function (number, addNumberToControl) {
 					var found = false,
 						// Number can come back from the buy common control, as an object, or from the spare selector, as a string
-						foundNumber = _.isObject(number) ? Object.keys(number)[0] : number;
+						foundNumber = _.isObject(number) ? _.keys(number)[0] : number;
 
 					addNumberToControl && addNumberToControl(foundNumber);