diff --git a/.editorconfig b/.editorconfig
index 615323a..824b9c3 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -28,7 +28,7 @@ max_line_length = off
 # 4 space indentation
 indent_size = 4
 
-[*.{yml,zpt,pt,dtml}]
+[*.{yml,zpt,pt,dtml,zcml}]
 # 2 space indentation
 indent_size = 2
 
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index a041880..5a48b99 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -13,22 +13,25 @@ on:
 jobs:
   build:
     strategy:
-      # We want do see all failures:
+      # We want to see all failures:
       fail-fast: false
       matrix:
+        os:
+        - ubuntu
         config:
         # [Python version, tox env]
-        - ["3.8",   "lint"]
+        - ["3.9",   "lint"]
         - ["2.7",   "py27"]
         - ["3.5",   "py35"]
         - ["3.6",   "py36"]
         - ["3.7",   "py37"]
         - ["3.8",   "py38"]
         - ["3.9",   "py39"]
-        - ["3.8",   "docs"]
-        - ["3.8",   "coverage"]
+        - ["3.10",  "py310"]
+        - ["3.9",   "docs"]
+        - ["3.9",   "coverage"]
 
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}-latest
     name: ${{ matrix.config[1] }}
     steps:
     - uses: actions/checkout@v2
diff --git a/.gitignore b/.gitignore
index f8055eb..5abcfe9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,9 +1,11 @@
 # Generated from:
 # https://github.com/zopefoundation/meta/tree/master/config/zope-product
+*.dll
 *.egg-info/
 *.profraw
 *.pyc
 *.pyo
+*.so
 .coverage
 .coverage.*
 .eggs/
diff --git a/.meta.toml b/.meta.toml
index 5b9ff99..f55cf89 100644
--- a/.meta.toml
+++ b/.meta.toml
@@ -2,14 +2,15 @@
 # https://github.com/zopefoundation/meta/tree/master/config/zope-product
 [meta]
 template = "zope-product"
-commit-id = "f8468b0bc5c92479b3043372d89cf5852176015d"
+commit-id = "efb3f62f0f2d8deea657bae8db49a191698e62ef"
 
 [python]
-with-appveyor = false
 with-pypy = false
 with-legacy-python = true
 with-docs = true
 with-sphinx-doctests = false
+with-windows = false
+with-future-python = false
 
 [coverage]
 fail-under = 76
diff --git a/CHANGES.txt b/CHANGES.txt
index 8e067dc..4c40d34 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -10,7 +10,7 @@ Breaking changes:
 
 New features:
 
-- *add item here*
+- Add support for Python 3.10.
 
 Bug fixes:
 
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
new file mode 100644
index 0000000..b5c34d4
--- /dev/null
+++ b/CONTRIBUTING.md
@@ -0,0 +1,23 @@
+<!--
+Generated from:
+https://github.com/zopefoundation/meta/tree/master/config/zope-product
+--> 
+# Contributing to zopefoundation projects
+
+The projects under the zopefoundation GitHub organization are open source and
+welcome contributions in different forms:
+
+* bug reports
+* code improvements and bug fixes
+* documentation improvements
+* pull request reviews
+
+For any changes in the repository besides trivial typo fixes you are required
+to sign the contributor agreement. See
+https://www.zope.dev/developer/becoming-a-committer.html for details.
+
+Please visit our [Developer
+Guidelines](https://www.zope.dev/developer/guidelines.html) if you'd like to
+contribute code changes and our [guidelines for reporting
+bugs](https://www.zope.dev/developer/reporting-bugs.html) if you want to file a
+bug report.
diff --git a/MANIFEST.in b/MANIFEST.in
index 0a22c45..b958979 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,5 +1,6 @@
 # Generated from:
 # https://github.com/zopefoundation/meta/tree/master/config/zope-product
+include *.md
 include *.rst
 include *.txt
 include buildout.cfg
diff --git a/setup.py b/setup.py
index 4b4b4e4..3c626f1 100644
--- a/setup.py
+++ b/setup.py
@@ -33,6 +33,7 @@ def _package_doc(name):
         'Programming Language :: Python :: 3.7',
         'Programming Language :: Python :: 3.8',
         'Programming Language :: Python :: 3.9',
+        'Programming Language :: Python :: 3.10',
         'Topic :: Software Development',
         'Topic :: Software Development :: Libraries :: Application Frameworks',
         ],
diff --git a/tox.ini b/tox.ini
index 09b0fd1..7997955 100644
--- a/tox.ini
+++ b/tox.ini
@@ -10,16 +10,15 @@ envlist =
     py37
     py38
     py39
+    py310
     docs
     coverage
 
 [testenv]
 skip_install = true
-# We need to pin setuptools until we have zc.buildout 3.0.
 deps =
-    setuptools < 52
-    zc.buildout
-    zope.testrunner
+    zc.buildout >= 3.0.0rc3
+    wheel > 0.37
 commands_pre =
     py27,py35: {envbindir}/buildout -nc {toxinidir}/buildout4.cfg buildout:directory={envdir} buildout:develop={toxinidir} install test
     !py27-!py35: {envbindir}/buildout -nc {toxinidir}/buildout.cfg buildout:directory={envdir} buildout:develop={toxinidir} install test
@@ -34,7 +33,7 @@ allowlist_externals =
     mkdir
 commands =
     isort --check-only --diff {toxinidir}/src {toxinidir}/setup.py
-    - flake8 --format=html {toxinidir}/src {toxinidir}/setup.py
+    - flake8 {toxinidir}/src {toxinidir}/setup.py
     flake8 {toxinidir}/src {toxinidir}/setup.py
     check-manifest
     check-python-versions
@@ -43,8 +42,6 @@ deps =
     check-python-versions
     flake8
     isort
-    # helper to generate HTML reports:
-    flake8-html
     # Useful flake8 plugins that are Python and Plone specific:
     flake8-coding
     flake8-debugger
@@ -61,8 +58,6 @@ commands =
 [testenv:docs]
 basepython = python3
 skip_install = false
-# Until repoze.sphinx.autointerface supports Sphinx 4.x we cannot use it:
-deps = Sphinx < 4
 extras =
     docs
 commands_pre =
@@ -87,7 +82,7 @@ commands =
 [coverage:run]
 branch = True
 plugins = coverage_python_version
-source = src
+source = Products.DCWorkflow
 
 [coverage:report]
 precision = 2