diff --git a/setup.py b/setup.py
index 0b40e02b..8341be21 100755
--- a/setup.py
+++ b/setup.py
@@ -90,4 +90,7 @@ 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",
+        "Programming Language :: Python :: Implementation :: PyPy",
         "Topic :: Office/Business :: Groupware"])