diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 0215aac..f4946db 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -20,13 +20,14 @@ jobs:
         - ["ubuntu", "ubuntu-20.04"]
         config:
         # [Python version, tox env]
+        - ["3.9",   "release-check"]
         - ["3.9",   "lint"]
         - ["3.7",   "py37"]
         - ["3.8",   "py38"]
         - ["3.9",   "py39"]
         - ["3.10",  "py310"]
         - ["3.11",  "py311"]
-        - ["3.12.0-rc.1",  "py312"]
+        - ["3.12",  "py312"]
         - ["3.9",   "coverage"]
 
     runs-on: ${{ matrix.os[1] }}
diff --git a/.meta.toml b/.meta.toml
index 082d761..fc24c97 100644
--- a/.meta.toml
+++ b/.meta.toml
@@ -2,13 +2,13 @@
 # https://github.com/zopefoundation/meta/tree/master/config/zope-product
 [meta]
 template = "zope-product"
-commit-id = "28abbfda"
+commit-id = "6f8d8c51"
 
 [python]
 with-pypy = false
 with-sphinx-doctests = false
 with-windows = false
-with-future-python = true
+with-future-python = false
 with-macos = false
 
 [tox]
diff --git a/CHANGES.rst b/CHANGES.rst
index f0b1c60..beb3dd9 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -4,7 +4,7 @@ Changelog
 4.6 (unreleased)
 ----------------
 
-- Nothing changed yet.
+- Add official support for Python 3.12.
 
 
 4.5 (2023-09-18)
diff --git a/setup.py b/setup.py
index 845adc3..77d91ee 100644
--- a/setup.py
+++ b/setup.py
@@ -56,6 +56,7 @@
           "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",
           "Topic :: Text Processing :: Markup",
       ],
diff --git a/tox.ini b/tox.ini
index 8792e6a..6bef684 100644
--- a/tox.ini
+++ b/tox.ini
@@ -3,6 +3,7 @@
 [tox]
 minversion = 3.18
 envlist =
+    release-check
     lint
     py37
     py38
@@ -25,6 +26,23 @@ commands_pre =
 commands =
     {envdir}/bin/test {posargs:-cv}
 
+[testenv:release-check]
+description = ensure that the distribution is ready to release
+basepython = python3
+skip_install = true
+deps =
+    twine
+    build
+    check-manifest
+    check-python-versions >= 0.20.0
+    wheel
+commands_pre =
+commands =
+    check-manifest
+    check-python-versions
+    python -m build --sdist --no-isolation
+    twine check dist/*
+
 [testenv:lint]
 basepython = python3
 commands_pre =
@@ -34,11 +52,7 @@ allowlist_externals =
 commands =
     isort --check-only --diff {toxinidir}/src {toxinidir}/setup.py
     flake8 {toxinidir}/src {toxinidir}/setup.py
-    check-manifest
-    check-python-versions
 deps =
-    check-manifest
-    check-python-versions
     flake8
     isort
     # Useful flake8 plugins that are Python and Plone specific: