--- a/runtime/ServicePublisher.py	Fri Sep 22 20:12:22 2017 +0300
+++ b/runtime/ServicePublisher.py	Thu Sep 28 12:20:40 2017 +0300
@@ -30,7 +30,7 @@
 service_type = '_PYRO._tcp.local.'
 
 
-class ServicePublisher():
+class ServicePublisher(object):
     def __init__(self):
         # type: fully qualified service type name
         self.serviceproperties = {'description': 'Beremiz remote PLC'}