diff --git a/setup.py b/setup.py
index a7b2ed5..554da01 100644
--- a/setup.py
+++ b/setup.py
@@ -30,6 +30,7 @@
         "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
+        "Programming Language :: Python :: 3.9",
         "Topic :: Communications :: Chat",
     ],
     keywords="openssl asyncio library transport starttls",