diff --git a/gulpfile.js b/gulpfile.js
index 6bdf935493..824439fc72 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -103,7 +103,10 @@ var cssTasks = function(filename) {
         'opera 12'
       ]
     })
-  .pipe(minifyCss)
+    .pipe(minifyCss, {
+      advanced: false,
+      rebase: false
+    })
     .pipe(function() {
       return gulpif(enabled.rev, rev());
     })