diff --git a/lib/crypto.js b/lib/crypto.js
index ba131cd7f3..ff3314b8a0 100644
--- a/lib/crypto.js
+++ b/lib/crypto.js
@@ -13,6 +13,8 @@
 var util = require('./util');
 
 function verifyToken(idToken, key) {
+  key = util.clone(key);
+
   var format = 'jwk';
   var algo = {
     name: 'RSASSA-PKCS1-v1_5',
@@ -21,6 +23,9 @@ function verifyToken(idToken, key) {
   var extractable = true;
   var usages = ['verify'];
 
+  // https://connect.microsoft.com/IE/feedback/details/2242108/webcryptoapi-importing-jwk-with-use-field-fails
+  delete key.use;
+
   return crypto.subtle.importKey(
     format,
     key,