diff --git a/setup.py b/setup.py
index d55b3782..fcde4aec 100644
--- a/setup.py
+++ b/setup.py
@@ -103,6 +103,7 @@
         "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 :: C",
         ],