diff --git a/CHANGES.txt b/CHANGES.txt
index 3cf378e..2210c40 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -4,6 +4,10 @@ Changelog
 1.0b11 (unreleased)
 -------------------
 
+- Declare z3c.form and zope.schema as minimum version dependencies in setup.py
+  in case people use a different KGS.
+  [timo]
+
 - Add and update es and eu l10ns.
   [dukebody, on behalf of erral]
 
diff --git a/setup.py b/setup.py
index 963de26..f3086c2 100644
--- a/setup.py
+++ b/setup.py
@@ -37,7 +37,9 @@ setup(name='plone.app.discussion',
           'zope.event',
           'zope.container',
           'zope.lifecycleevent',
+          'zope.schema>=3.6.0',
           'zope.site',
+          'z3c.form>=2.3.3',
       ],
       extras_require = {
           'test': [