diff --git a/lib/switches.js b/lib/switches.js
index d87ae0b..86beff3 100644
--- a/lib/switches.js
+++ b/lib/switches.js
@@ -22,7 +22,7 @@ module.exports = {
     if (newEl.hasAttributes()) {
       const attrs = newEl.attributes;
       for (var i = 0; i < attrs.length; i++) {
-        oldEl.attributes.setNamedItem(attrs[i])
+        oldEl.attributes.setNamedItem(attrs[i].cloneNode())
       }
     }