diff --git a/Gruntfile.js b/Gruntfile.js
index e4b2155baa..ad16dd3350 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -238,7 +238,7 @@ module.exports = function (grunt) {
       options: {
         compatibility: 'ie8',
         keepSpecialComments: '*',
-        noAdvanced: true // turn advanced optimizations off until the issue is fixed in clean-css
+        noAdvanced: true
       },
       docs: {
         src: [