diff --git a/setup.py b/setup.py
index f3086c2..249ba89 100644
--- a/setup.py
+++ b/setup.py
@@ -37,7 +37,6 @@ setup(name='plone.app.discussion',
           'zope.event',
           'zope.container',
           'zope.lifecycleevent',
-          'zope.schema>=3.6.0',
           'zope.site',
           'z3c.form>=2.3.3',
       ],