diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 8342119..ac0ce0d 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
+        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11", "3.12"]
 
     steps:
     - uses: actions/checkout@v2
@@ -25,7 +25,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        python -m pip install tox
+        python -m pip install setuptools tox
 
     # NOTE(lb): By creating a sdist and then testing/working with that, we ensure
     # its completeness.
@@ -69,7 +69,7 @@ jobs:
       working-directory: ${{ github.workspace }}/tmp/sdist
 
     - name: Publish package
-      if: github.event_name == 'release' && startsWith(github.ref, 'refs/tags') && matrix.python-version == 3.11
+      if: github.event_name == 'release' && startsWith(github.ref, 'refs/tags') && matrix.python-version == 3.12
       uses: pypa/gh-action-pypi-publish@v1.4.2
       with:
         user: __token__
diff --git a/setup.py b/setup.py
index aa3e059..4284c40 100644
--- a/setup.py
+++ b/setup.py
@@ -41,6 +41,7 @@ def readme():
         'Programming Language :: Python :: 3.9',
         'Programming Language :: Python :: 3.10',
         'Programming Language :: Python :: 3.11',
+        'Programming Language :: Python :: 3.12',
         'Programming Language :: Python :: Implementation :: CPython',
         'Programming Language :: Python :: Implementation :: Stackless',
         'Topic :: Documentation',
diff --git a/tox.ini b/tox.ini
index 63551b9..cacc5a2 100644
--- a/tox.ini
+++ b/tox.ini
@@ -7,7 +7,7 @@
 # them.
 
 [tox]
-envlist = {py37,py38,py39,py310,py311}-{sphinx34,sphinx33,sphinx32,sphinx24,sphinx18}
+envlist = {py37,py38,py39,py310,py311,py312}-{sphinx34,sphinx33,sphinx32,sphinx24,sphinx18}
 minversion = 2.7.0
 
 [testenv]