diff --git a/setup.py b/setup.py
index d5bafd7..9a0aab8 100644
--- a/setup.py
+++ b/setup.py
@@ -38,6 +38,7 @@ def load_requirements(fname):
         "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",
         "Topic :: Security",
     ],