diff --git a/setup.py b/setup.py
index 7483781..2a2a862 100644
--- a/setup.py
+++ b/setup.py
@@ -33,6 +33,7 @@
         'Programming Language :: Python',
         'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3.3',
+        'Programming Language :: Python :: 3.9',
         'Programming Language :: Python :: 3.4',
         'Topic :: Internet :: WWW/HTTP',
         'Topic :: Internet :: WWW/HTTP :: Dynamic Content',