diff --git a/utils/he_ipv6/tunnelbroker.py b/utils/he_ipv6/tunnelbroker.py
index 2fb7cd7..daef1ff 100644
--- a/utils/he_ipv6/tunnelbroker.py
+++ b/utils/he_ipv6/tunnelbroker.py
@@ -207,7 +207,7 @@ class TunnelBroker(object):
     def update(self):
         if not self.my_ip:
             self._get_my_ip()
-        auth_handler = requests.auth.HTTPBasicAuth(self.tun.creds.user, self.tun.creds.update_key)
+        auth_handler = requests.auth.HTTPBasicAuth(self.tun.creds.user, self.tun.update_key)
         logger.debug('Set auth handler.')
         logger.debug('Requesting IP update at provider.')
         req = requests.get(self.url_api,