diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 90b3669..f32b3a9 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -48,6 +48,7 @@ jobs:
             3.9
             3.10
             3.11
+            3.12
 
       - name: "Restore cache"
         id: "restore-cache"
@@ -107,7 +108,7 @@ jobs:
       - name: "Set up Python"
         uses: "actions/setup-python@v4"
         with:
-          python-version: "3.11"
+          python-version: "3.12"
           cache: pip
           cache-dependency-path: 'requirements/*.txt'
 
diff --git a/Makefile b/Makefile
index 7530512..5ffce59 100644
--- a/Makefile
+++ b/Makefile
@@ -37,7 +37,7 @@ sterile: clean ## remove absolutely all built artifacts
 	rm -fr .tox
 
 coverage: clean ## generate and view HTML coverage report
-	tox -e py37,py311,coverage
+	tox -e py37,py312,coverage
 	$(BROWSER)htmlcov/index.html
 
 docs: botedits ## generate Sphinx HTML documentation, including API docs
diff --git a/setup.cfg b/setup.cfg
index f761495..084a664 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -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
 project_urls =
     # For some reason, these appear in reverse order on pypi...
     Mastodon = https://hachyderm.io/@nedbat
diff --git a/tox.ini b/tox.ini
index e65ff62..9c42826 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,13 +1,13 @@
 [tox]
 envlist =
     # Run on all our Pythons:
-    py3{7,8,9,10,11},
+    py3{7,8,9,10,11,12},
     # Run with no extras on lowest and highest version:
-    py3{7,11}-no_extras,
+    py3{7,12}-no_extras,
     # And the rest:
     pypy3, coverage, docs, quality
 labels =
-    ci-tests = py3{7,8,9,10,11},pypy3
+    ci-tests = py3{7,8,9,10,11,12},pypy3
 
 [testenv]
 package = wheel
@@ -29,8 +29,8 @@ commands =
     coverage run -p -m pytest -Wd {posargs}
 
 [testenv:coverage]
-depends = py37,py38,py39,py310,py311,pypy3
-basepython = python3.11
+depends = py37,py38,py39,py310,py311,py312,pypy3
+basepython = python3.12
 commands =
     coverage combine -q
     coverage report -m --skip-covered