diff --git a/setup.cfg b/setup.cfg
index a13e7e1fde859c212be3b9357f65061bd7b66587..33bbb7a53ea7df4c94ffd1f335709a0f30a8c727 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -18,6 +18,7 @@ classifier =
     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 :: Python :: Implementation :: CPython