diff --git a/pyproject.toml b/pyproject.toml
index 8d86e93e..6ee532c2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -20,6 +20,7 @@ classifiers = [
   "Programming Language :: Python :: 3.10",
   "Programming Language :: Python :: 3.11",
   "Programming Language :: Python :: 3.12",
+  "Programming Language :: Python :: 3.13",
 ]
 dependencies = ["apluggy>=1.0", "exceptiongroup>=1.2", "transitions>=0.9.0"]
 dynamic = ["version"]
diff --git a/tox.ini b/tox.ini
index dbb76f4f..ae624a26 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py310,py311,py312
+envlist = py310,py311,py312,py313
 
 [testenv]
 deps = .[tests]