diff --git a/setup.py b/setup.py
index e46ffa82..fb220d90 100644
--- a/setup.py
+++ b/setup.py
@@ -25,6 +25,7 @@ CLASSIFIERS = [
     'Programming Language :: Python :: 3.6',
     'Programming Language :: Python :: 3.7',
     'Programming Language :: Python :: 3.8',
+    'Programming Language :: Python :: 3.9',
     'Programming Language :: Python :: 3 :: Only',
     'Programming Language :: Python :: Implementation :: CPython',
     'Programming Language :: Python :: Implementation :: PyPy',