diff --git a/setup.py b/setup.py
index 4096685c..76449378 100644
--- a/setup.py
+++ b/setup.py
@@ -75,6 +75,7 @@ setup(
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
         "Programming Language :: Python :: 3.12",
+        "Programming Language :: Python :: 3.13",
         "Programming Language :: Python :: Implementation :: CPython",
         "Programming Language :: Python :: Implementation :: PyPy",
         "Topic :: Office/Business :: Groupware"])