diff --git a/grunt/config/uglify.js b/grunt/config/uglify.js
index 7936477fb..6f160e708 100644
--- a/grunt/config/uglify.js
+++ b/grunt/config/uglify.js
@@ -20,10 +20,7 @@ module.exports = function (grunt, options) {
                     src: ['*.js', '!*.min.js'],
                     dest: '<%= outputdir %>'
                 }
-            ],
-            options: {
-                ie8: true
-            }
+            ]
         }
     }
 }
\ No newline at end of file
diff --git a/src/core/js/views/notifyView.js b/src/core/js/views/notifyView.js
index e8ad51c1b..89f54489c 100644
--- a/src/core/js/views/notifyView.js
+++ b/src/core/js/views/notifyView.js
@@ -5,13 +5,13 @@ define([
     var NotifyView = Backbone.View.extend({
 
         className: function() {
-            let classes = 'notify ';
+            var classes = 'notify ';
             classes += (this.model.get('_classes') || '');
             return classes;
         },
 
         disableAnimation: false,
-        
+
         escapeKeyAttached: false,
 
         initialize: function() {
@@ -194,7 +194,7 @@ define([
 
             this.subView = this.model.get("_view");
             if (!this.subView) return;
-            
+
             this.$(".notify-popup-content-inner").append(this.subView.$el);
 
         },