diff --git a/{{cookiecutter.project_slug}}/pyproject.toml b/{{cookiecutter.project_slug}}/pyproject.toml
index 7409dddf67a1db23895ce628f6070e15a5186ddb..66c1c909e41dce1bef864d842cbbb53d9e9ac338 100644
--- a/{{cookiecutter.project_slug}}/pyproject.toml
+++ b/{{cookiecutter.project_slug}}/pyproject.toml
@@ -20,6 +20,7 @@ classifiers = [
   "Programming Language :: Python :: 3.9",
   "Programming Language :: Python :: 3.10",
   "Programming Language :: Python :: 3.11",
+  "Programming Language :: Python :: 3.12"
 ]
 
 [tool.scikit-build]
diff --git a/{{cookiecutter.project_slug}}/tox.ini b/{{cookiecutter.project_slug}}/tox.ini
index efe916668846670e2f8e08db8cb09417fb5d6e28..4bc23290e77bc1fd67daaf2f573022f2f90fbc40 100644
--- a/{{cookiecutter.project_slug}}/tox.ini
+++ b/{{cookiecutter.project_slug}}/tox.ini
@@ -1,6 +1,6 @@
 [tox]
 # Generative environment list to test all supported Python versions
-envlist = py3{8,9,10,11},black,pep8,pylint
+envlist = py3{8,9,10,11,12},black,pep8,pylint
 minversion = 3.18.0
 
 [testenv]