--- a/setup.py	Tue Jun 11 17:23:23 2019 +0200
+++ b/setup.py	Wed Jun 12 12:40:46 2019 +0200
@@ -82,6 +82,7 @@
           'zope.annotation',
           'zope.component',
           'zope.container',
+          'zope.dublincore',
           'zope.datetime',
           'zope.interface',
           'zope.location',