diff --git a/setup.py b/setup.py
index 4eead8d..3116f0c 100644
--- a/setup.py
+++ b/setup.py
@@ -57,7 +57,7 @@ def read(*rnames):
         'Natural Language :: English',
         'Operating System :: OS Independent',
         'Topic :: Internet :: WWW/HTTP',
-        'Framework :: Zope3',
+        'Framework :: Zope :: 3',
     ],
     url='http://github.com/zopefoundation/zope.vocabularyregistry',
     packages=find_packages('src'),