diff -r c08bbfe7bbd4 -r 20eb4e7a0647 runtime/WampClient.py
--- a/runtime/WampClient.py	Thu Apr 04 14:00:17 2019 +0200
+++ b/runtime/WampClient.py	Mon Apr 08 12:53:18 2019 +0200
@@ -28,7 +28,7 @@
 import json
 import os
 import re
-from builtins import str as text
+from six import text_type as text
 from autobahn.twisted import wamp
 from autobahn.twisted.websocket import WampWebSocketClientFactory, connectWS
 from autobahn.wamp import types, auth