--- a/canfestival/canfestival.py	Fri Sep 22 20:12:22 2017 +0300
+++ b/canfestival/canfestival.py	Thu Sep 28 12:20:40 2017 +0300
@@ -483,7 +483,7 @@
         return self.Manager.GetCurrentBufferState()
 
 
-class RootClass:
+class RootClass(object):
     XSD = """<?xml version="1.0" encoding="ISO-8859-1" ?>
     <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">
       <xsd:element name="CanFestivalInstance">