diff --git a/setup.cfg b/setup.cfg
index 9fe10ad6..0fa3d6cc 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -12,6 +12,7 @@ classifiers =
     Programming Language :: Python :: 3.10
     Programming Language :: Python :: 3.11
     Programming Language :: Python :: 3.12
+    Programming Language :: Python :: 3.13
 
 [options]
 install_requires = grill-names>=2.6.0; networkx>=3.4; pydot>=3.0.1; numpy; printree