diff --git a/.eslintrc.es5.json b/.eslintrc.es5.json
index c736e862fe..9141f503e5 100644
--- a/.eslintrc.es5.json
+++ b/.eslintrc.es5.json
@@ -86,7 +86,6 @@
     "dot-notation": 0,
     "linebreak-style": 0,
     "indent": 0,
-    "quote-props": 0,
     "prefer-template": 0,
     "func-names": 0
   }
diff --git a/assets/js/src/form_editor/form_editor.js b/assets/js/src/form_editor/form_editor.js
index 58fb388642..98fec58922 100644
--- a/assets/js/src/form_editor/form_editor.js
+++ b/assets/js/src/form_editor/form_editor.js
@@ -319,10 +319,10 @@ var WysijaForm = {
   save: function() {
     var position = 1,
       data = {
-        'name': $F('mailpoet_form_name'),
-        'settings': $('mailpoet_form_settings').serialize(true),
-        'body': [],
-        'styles': (MailPoet.CodeEditor !== undefined) ? MailPoet.CodeEditor.getValue() : null
+        name: $F('mailpoet_form_name'),
+        settings: $('mailpoet_form_settings').serialize(true),
+        body: [],
+        styles: (MailPoet.CodeEditor !== undefined) ? MailPoet.CodeEditor.getValue() : null
       };
     // body
     WysijaForm.getBlocks().each(function(b) {
diff --git a/assets/js/src/jquery.serialize_object.js b/assets/js/src/jquery.serialize_object.js
index a2e7ad50e2..ca65ec9faf 100644
--- a/assets/js/src/jquery.serialize_object.js
+++ b/assets/js/src/jquery.serialize_object.js
@@ -25,7 +25,7 @@ define(
      */
     $.fn.serializeObject = function(coerce) {
       var obj = {},
-        coerce_types = { 'true': !0, 'false': !1, 'null': null };
+        coerce_types = { true: !0, false: !1, null: null };
 
       // Iterate over all name=value pairs.
       $.each( this.serializeArray(), function(j, v){
diff --git a/assets/js/src/newsletter_editor/behaviors/HighlightEditingBehavior.js b/assets/js/src/newsletter_editor/behaviors/HighlightEditingBehavior.js
index 1a18c827bf..05cdf1ffc5 100644
--- a/assets/js/src/newsletter_editor/behaviors/HighlightEditingBehavior.js
+++ b/assets/js/src/newsletter_editor/behaviors/HighlightEditingBehavior.js
@@ -11,8 +11,8 @@ define([
 
   BL.HighlightEditingBehavior = Marionette.Behavior.extend({
     modelEvents: {
-      'startEditing': 'enableHighlight',
-      'stopEditing': 'disableHighlight'
+      startEditing: 'enableHighlight',
+      stopEditing: 'disableHighlight'
     },
     enableHighlight: function() {
       this.$el.addClass('mailpoet_highlight');
diff --git a/assets/js/src/newsletter_editor/behaviors/ResizableBehavior.js b/assets/js/src/newsletter_editor/behaviors/ResizableBehavior.js
index 9bf478992d..467989fb98 100644
--- a/assets/js/src/newsletter_editor/behaviors/ResizableBehavior.js
+++ b/assets/js/src/newsletter_editor/behaviors/ResizableBehavior.js
@@ -19,8 +19,8 @@ define([
       modelField: 'styles.block.height'
     },
     events: {
-      'mouseenter': 'showResizeHandle',
-      'mouseleave': 'hideResizeHandle'
+      mouseenter: 'showResizeHandle',
+      mouseleave: 'hideResizeHandle'
     },
     onRender: function() {
       this.attachResize();
diff --git a/assets/js/src/newsletter_editor/blocks/automatedLatestContent.js b/assets/js/src/newsletter_editor/blocks/automatedLatestContent.js
index d57dbae869..a5e1181846 100644
--- a/assets/js/src/newsletter_editor/blocks/automatedLatestContent.js
+++ b/assets/js/src/newsletter_editor/blocks/automatedLatestContent.js
@@ -131,7 +131,7 @@ define([
     className: 'mailpoet_block mailpoet_automated_latest_content_block mailpoet_droppable_block',
     initialize: function() {
       function replaceButtonStylesHandler(data) {
-        this.model.set({'readMoreButton': data});
+        this.model.set({readMoreButton: data});
       }
       App.getChannel().on('replaceAllButtonStyles', replaceButtonStylesHandler.bind(this));
     },
@@ -143,7 +143,7 @@ define([
     modelEvents: _.extend(
       _.omit(base.BlockView.prototype.modelEvents, 'change'),
       {
-        'postsChanged': 'render'
+        postsChanged: 'render'
       }),
     events: _.extend(base.BlockView.prototype.events, {
       'click .mailpoet_automated_latest_content_block_overlay': 'showSettings'
diff --git a/assets/js/src/newsletter_editor/blocks/base.js b/assets/js/src/newsletter_editor/blocks/base.js
index aca60706fa..484cf11445 100644
--- a/assets/js/src/newsletter_editor/blocks/base.js
+++ b/assets/js/src/newsletter_editor/blocks/base.js
@@ -50,13 +50,13 @@ define([
       toolsRegion: '> .mailpoet_tools'
     },
     modelEvents: {
-      'change': 'render',
-      'delete': 'deleteBlock',
-      'duplicate': 'duplicateBlock'
+      change: 'render',
+      delete: 'deleteBlock',
+      duplicate: 'duplicateBlock'
     },
     events: {
-      'mouseenter': 'showTools',
-      'mouseleave': 'hideTools'
+      mouseenter: 'showTools',
+      mouseleave: 'hideTools'
     },
     behaviors: {
       DraggableBehavior: {
diff --git a/assets/js/src/newsletter_editor/blocks/image.js b/assets/js/src/newsletter_editor/blocks/image.js
index 712800acc5..12c76b2d34 100644
--- a/assets/js/src/newsletter_editor/blocks/image.js
+++ b/assets/js/src/newsletter_editor/blocks/image.js
@@ -177,7 +177,7 @@ define([
 
           var handlers = {
               content: {
-                'embed': 'embedContent',
+                embed: 'embedContent',
                 'edit-selection': 'editSelectionContent'
               },
               toolbar: {
diff --git a/assets/js/src/newsletter_editor/blocks/posts.js b/assets/js/src/newsletter_editor/blocks/posts.js
index 92c1a32757..3050adb207 100644
--- a/assets/js/src/newsletter_editor/blocks/posts.js
+++ b/assets/js/src/newsletter_editor/blocks/posts.js
@@ -296,7 +296,7 @@ define([
       this.blockModel = options.blockModel;
     },
     events: {
-      'scroll': 'onPostsScroll'
+      scroll: 'onPostsScroll'
     },
     onPostsScroll: function(event) {
       var $postsBox = jQuery(event.target);
@@ -326,10 +326,10 @@ define([
           this.$('.mailpoet_post_scroll_container').scrollTop(0);
         }
       },
-      'loadingMorePosts': function() {
+      loadingMorePosts: function() {
         this.$('.mailpoet_post_selection_loading').css('visibility', 'visible');
       },
-      'morePostsLoaded': function() {
+      morePostsLoaded: function() {
         this.$('.mailpoet_post_selection_loading').css('visibility', 'hidden');
       }
     },
diff --git a/assets/js/src/newsletter_editor/blocks/social.js b/assets/js/src/newsletter_editor/blocks/social.js
index 35be008944..7533d61f18 100644
--- a/assets/js/src/newsletter_editor/blocks/social.js
+++ b/assets/js/src/newsletter_editor/blocks/social.js
@@ -87,7 +87,7 @@ define([
     tagName: 'span',
     getTemplate: function() { return templates.socialIconBlock; },
     modelEvents: {
-      'change': 'render'
+      change: 'render'
     },
     templateContext: function() {
       var allIconSets = App.getAvailableStyles().get('socialIconSets');
@@ -214,7 +214,7 @@ define([
   SocialBlockSettingsIconSelectorView = Marionette.View.extend({
     getTemplate: function() { return templates.socialSettingsIconSelector; },
     regions: {
-      'icons': '#mailpoet_social_icon_selector_contents'
+      icons: '#mailpoet_social_icon_selector_contents'
     },
     events: {
       'click .mailpoet_add_social_icon': 'addSocialIcon'
@@ -237,7 +237,7 @@ define([
   SocialBlockSettingsStylesView = Marionette.View.extend({
     getTemplate: function() { return templates.socialSettingsStyles; },
     modelEvents: {
-      'change': 'render'
+      change: 'render'
     },
     events: {
       'click .mailpoet_social_icon_set': 'changeSocialIconSet'
diff --git a/assets/js/src/newsletter_editor/components/styles.js b/assets/js/src/newsletter_editor/components/styles.js
index 2e5736785f..7efa5adf7f 100644
--- a/assets/js/src/newsletter_editor/components/styles.js
+++ b/assets/js/src/newsletter_editor/components/styles.js
@@ -49,7 +49,7 @@ define([
   Module.StylesView = Marionette.View.extend({
     getTemplate: function() { return templates.styles; },
     modelEvents: {
-      'change': 'render'
+      change: 'render'
     },
     serializeData: function() {
       return this.model.toJSON();
diff --git a/assets/js/src/settings/reinstall_from_scratch.js b/assets/js/src/settings/reinstall_from_scratch.js
index ab296beb96..34b602dc5e 100644
--- a/assets/js/src/settings/reinstall_from_scratch.js
+++ b/assets/js/src/settings/reinstall_from_scratch.js
@@ -15,9 +15,9 @@ define(
 
         MailPoet.Modal.loading(true);
         MailPoet.Ajax.post({
-          'api_version': window.mailpoet_api_version,
-          'endpoint': 'setup',
-          'action': 'reset'
+          api_version: window.mailpoet_api_version,
+          endpoint: 'setup',
+          action: 'reset'
         }).always(function () {
           MailPoet.Modal.loading(false);
         }).done(function () {
diff --git a/assets/js/src/subscribers/importExport/export.js b/assets/js/src/subscribers/importExport/export.js
index ae85fd187f..88def65bb0 100644
--- a/assets/js/src/subscribers/importExport/export.js
+++ b/assets/js/src/subscribers/importExport/export.js
@@ -142,11 +142,11 @@ define(
           endpoint: 'ImportExport',
           action: 'processExport',
           data: JSON.stringify({
-            'export_confirmed_option': exportData.exportConfirmedOption,
-            'export_format_option': jQuery(':radio[name="option_format"]:checked').val(),
-            'group_by_segment_option': (groupBySegmentOptionElement.is(':visible')) ? groupBySegmentOptionElement.prop('checked') : false,
-            'segments': (exportData.segments) ? segmentsContainerElement.val() : false,
-            'subscriber_fields': subscriberFieldsContainerElement.val()
+            export_confirmed_option: exportData.exportConfirmedOption,
+            export_format_option: jQuery(':radio[name="option_format"]:checked').val(),
+            group_by_segment_option: (groupBySegmentOptionElement.is(':visible')) ? groupBySegmentOptionElement.prop('checked') : false,
+            segments: (exportData.segments) ? segmentsContainerElement.val() : false,
+            subscriber_fields: subscriberFieldsContainerElement.val()
           })
         }).always(function(response) {
           MailPoet.Modal.loading(false);
diff --git a/assets/js/src/subscribers/importExport/import.js b/assets/js/src/subscribers/importExport/import.js
index f862d204c4..71f155b446 100644
--- a/assets/js/src/subscribers/importExport/import.js
+++ b/assets/js/src/subscribers/importExport/import.js
@@ -30,9 +30,9 @@ define(
         router = new (Backbone.Router.extend({
           routes: {
             '': 'home',
-            'step1': 'step1',
-            'step2': 'step2',
-            'step3': 'step3'
+            step1: 'step1',
+            step2: 'step2',
+            step3: 'step3'
           },
           home: function () {
             this.navigate('step1', {trigger: true});
@@ -407,13 +407,13 @@ define(
                   // since we assume that the header line is always present, we need
                   // to detect the header by checking if it contains a valid e-mail address
                   importData.step1 = {
-                    'header': (!emailRegex.test(
+                    header: (!emailRegex.test(
                             processedSubscribers[0][emailColumnPosition])
                     ) ? processedSubscribers.shift() : null,
-                    'subscribers': processedSubscribers,
-                    'subscribersCount': processedSubscribers.length,
-                    'duplicate': duplicateEmails,
-                    'invalid': invalidEmails
+                    subscribers: processedSubscribers,
+                    subscribersCount: processedSubscribers.length,
+                    duplicate: duplicateEmails,
+                    invalid: invalidEmails
                   };
                   router.navigate('step2', {trigger: true});
                 }
@@ -592,9 +592,9 @@ define(
                 }
               }).done(function(response) {
                 mailpoetSegments.push({
-                  'id': response.data.id,
-                  'name': response.data.name,
-                  'subscriberCount': 0
+                  id: response.data.id,
+                  name: response.data.name,
+                  subscriberCount: 0
                 });
 
                 var selected_values = segmentSelectElement.val();
@@ -670,7 +670,7 @@ define(
                       && displayedColumnsIds.indexOf(columnId) === -1)
                           ? columnId
                           : 'ignore';
-                  displayedColumns[i] = {'column_id': columnId};
+                  displayedColumns[i] = {column_id: columnId};
                   displayedColumnsIds.push(columnId);
                 }
                 return options.fn(displayedColumns);
@@ -747,17 +747,17 @@ define(
                       data: data
                     }).done(function(response) {
                       var new_column_data = {
-                        'id': response.data.id,
-                        'name': response.data.name,
-                        'type': response.data.type,
-                        'params': response.data.params,
-                        'custom': true
+                        id: response.data.id,
+                        name: response.data.name,
+                        type: response.data.type,
+                        params: response.data.params,
+                        custom: true
                       };
                       // if this is the first custom column, create an "optgroup"
                       if (mailpoetColumnsSelect2.length === 2) {
                         mailpoetColumnsSelect2.push({
-                          'name': MailPoet.I18n.t('userColumns'),
-                          'children': []
+                          name: MailPoet.I18n.t('userColumns'),
+                          children: []
                         });
                       }
                       mailpoetColumnsSelect2[2].children.push(new_column_data);
@@ -974,10 +974,10 @@ define(
               timestamp = Date.now() / 1000,
               subscribers = [],
               importResults = {
-                'created': 0,
-                'updated': 0,
-                'errors': [],
-                'segments': []
+                created: 0,
+                updated: 0,
+                errors: [],
+                segments: []
               },
               splitSubscribers = function (subscribers, size) {
                 return subscribers.reduce(function (res, item, index) {