--- a/__pkginfo__.py	Wed Sep 16 11:32:09 2015 +0200
+++ b/__pkginfo__.py	Wed Sep 16 14:45:15 2015 +0200
@@ -39,6 +39,7 @@
 ]
 
 __depends__ = {
+    'six': '>= 1.4.0',
     'logilab-common': '>= 0.63.1',
     'logilab-mtconverter': '>= 0.8.0',
     'rql': '>= 0.31.2',