diff --git a/package.json b/package.json
index f4556be7852a8555914c594694b422f2aa169013..4c650ea6142b5d9a6464a3a5e713b9506d49a89a 100644
--- a/package.json
+++ b/package.json
@@ -25,7 +25,7 @@
     , "colors" : "0.5.0"
     , "sax" : "0.2.3"
     , "mimelib-noiconv" : "0.1.3"
-    , "jwcrypto": "https://github.com/mozilla/jwcrypto/tarball/db7962111687"
+    , "jwcrypto": "https://github.com/mozilla/jwcrypto/tarball/3a21befabfff"
   }
   , "scripts": {
     "postinstall": "./scripts/generate_ephemeral_keys.sh",