diff -r e598d1acf354 -r 56b48961cc68 runtime/NevowServer.py
--- a/runtime/NevowServer.py	Fri Sep 22 20:12:22 2017 +0300
+++ b/runtime/NevowServer.py	Thu Sep 28 12:20:40 2017 +0300
@@ -191,7 +191,7 @@
     return website
 
 
-class statuslistener:
+class statuslistener(object):
     def __init__(self, site):
         self.oldstate = None
         self.site = site