diff --git a/setup.py b/setup.py
index e3db57db..22a42ff7 100644
--- a/setup.py
+++ b/setup.py
@@ -96,6 +96,7 @@ setup(
         "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
+        "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: Implementation :: CPython",
     ],
 )