--- a/__pkginfo__.py	Thu Mar 10 13:47:20 2016 +0100
+++ b/__pkginfo__.py	Wed Mar 16 10:06:18 2016 +0100
@@ -63,7 +63,7 @@
     'vobject': '>= 0.6.0',      # for ical view
     'rdflib': None,             #
     'pyzmq': None,
-    'Twisted': '',
+    'Twisted': '< 16.0.0',
     #'Products.FCKeditor':'',
     #'SimpleTAL':'>= 4.1.6',
     }