diff --git a/setup.py b/setup.py
index 4c894ca..3a57fcb 100644
--- a/setup.py
+++ b/setup.py
@@ -72,7 +72,7 @@ def read(*rnames):
         "Programming Language :: Python :: 3.7",
         'Programming Language :: Python :: Implementation :: CPython',
         'Programming Language :: Python :: Implementation :: PyPy',
-        "Framework :: Zope3",
+        "Framework :: Zope :: 3",
         "Topic :: Software Development :: Libraries :: Python Modules",
         "Topic :: Software Development :: Testing",
     ],