diff --git a/pyproject.toml b/pyproject.toml
index 196e861..1fd7fc1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -20,4 +20,6 @@ classifiers = [
     'Programming Language :: Python :: 3.8',
     'Programming Language :: Python :: 3.9',
     'Programming Language :: Python :: 3.10',
+    'Programming Language :: Python :: 3.11',
+    'Programming Language :: Python :: 3.12',
 ]
diff --git a/tox.ini b/tox.ini
index 9e42ab1..0427b2f 100644
--- a/tox.ini
+++ b/tox.ini
@@ -4,7 +4,7 @@
 # and then run "tox" from this directory.
 
 [tox]
-envlist = py{36,37,38}-test, py38-flake8, docs
+envlist = py{36,37,38,39,310,311,312}-test, py312-flake8, docs
 isolated_build = True
 
 [tox:.package]
@@ -26,7 +26,7 @@ files = example confuse test docs
 [testenv]
 deps =
     {test,cov}: {[_test]deps}
-    py{36,37,38}-flake8: {[_flake8]deps}
+    py{36,37,38,39,310,311,312}-flake8: {[_flake8]deps}
 commands =
     cov: nose2 --with-coverage {posargs}
     test: nose2 {posargs}