--- a/server/serverconfig.py	Tue Sep 15 12:51:27 2015 +0200
+++ b/server/serverconfig.py	Fri Sep 11 17:40:23 2015 +0200
@@ -22,7 +22,7 @@
 
 import sys
 from os.path import join, exists
-from StringIO import StringIO
+from io import StringIO
 
 import logilab.common.configuration as lgconfig
 from logilab.common.decorators import cached