diff --git a/setup.py b/setup.py
index 5aa3be67..7b7b2459 100644
--- a/setup.py
+++ b/setup.py
@@ -79,6 +79,7 @@ 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",
     ],
 )