diff --git a/setup.py b/setup.py
index b4e764e5..f06210d5 100644
--- a/setup.py
+++ b/setup.py
@@ -26,7 +26,7 @@
         'Framework :: Django :: 3.1',
         'Programming Language :: Python',
         'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3 :: only',
+        'Programming Language :: Python :: 3 :: Only',
         'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: 3.7',