diff --git a/.github/workflows/pre-commit.yml b/.github/workflows/pre-commit.yml
index 0f1b979..bb49834 100644
--- a/.github/workflows/pre-commit.yml
+++ b/.github/workflows/pre-commit.yml
@@ -14,10 +14,10 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Cache
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: |
             ~/.cache/pip
@@ -27,7 +27,7 @@ jobs:
           restore-keys: |
             lint-v1-
       - name: Set up Python
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
           python-version: '3.x'
 
diff --git a/COPYRIGHT.txt b/COPYRIGHT.txt
new file mode 100644
index 0000000..b8581dd
--- /dev/null
+++ b/COPYRIGHT.txt
@@ -0,0 +1 @@
+Zope Foundation and Contributors
diff --git a/LICENSE.txt b/LICENSE.txt
new file mode 100644
index 0000000..e1f9ad7
--- /dev/null
+++ b/LICENSE.txt
@@ -0,0 +1,44 @@
+Zope Public License (ZPL) Version 2.1
+
+A copyright notice accompanies this license document that identifies the
+copyright holders.
+
+This license has been certified as open source. It has also been designated as
+GPL compatible by the Free Software Foundation (FSF).
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions in source code must retain the accompanying copyright
+notice, this list of conditions, and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the accompanying copyright
+notice, this list of conditions, and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+
+3. Names of the copyright holders must not be used to endorse or promote
+products derived from this software without prior written permission from the
+copyright holders.
+
+4. The right to distribute this software or to use it for any purpose does not
+give you the right to use Servicemarks (sm) or Trademarks (tm) of the
+copyright
+holders. Use of them is covered by separate agreement with the copyright
+holders.
+
+5. If any files are modified, you must cause the modified files to carry
+prominent notices stating that you changed the files and the date of any
+change.
+
+Disclaimer
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY EXPRESSED
+OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/config/config-package.py b/config/config-package.py
index 739f3e9..0c3ec1e 100755
--- a/config/config-package.py
+++ b/config/config-package.py
@@ -1,4 +1,16 @@
 #!/usr/bin/env python3
+##############################################################################
+#
+# Copyright (c) 2019 Zope Foundation and Contributors.
+#
+# This software is subject to the provisions of the Zope Public License,
+# Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.
+# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
+# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
+# FOR A PARTICULAR PURPOSE.
+#
+##############################################################################
 from functools import cached_property
 from shared.call import abort
 from shared.call import call
diff --git a/config/drop-legacy-python.py b/config/drop-legacy-python.py
index aec2cc6..e24ac7a 100644
--- a/config/drop-legacy-python.py
+++ b/config/drop-legacy-python.py
@@ -1,4 +1,16 @@
-#!/usr/bin/env', 'python3
+#!/usr/bin/env python3
+##############################################################################
+#
+# Copyright (c) 2022 Zope Foundation and Contributors.
+#
+# This software is subject to the provisions of the Zope Public License,
+# Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.
+# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
+# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
+# FOR A PARTICULAR PURPOSE.
+#
+##############################################################################
 from shared.call import call
 from shared.call import wait_for_accept
 from shared.git import get_branch_name
diff --git a/config/meta-cfg-to-toml.py b/config/meta-cfg-to-toml.py
index 1955b32..5d079f6 100644
--- a/config/meta-cfg-to-toml.py
+++ b/config/meta-cfg-to-toml.py
@@ -1,4 +1,16 @@
 #!/usr/bin/env python3
+##############################################################################
+#
+# Copyright (c) 2020 Zope Foundation and Contributors.
+#
+# This software is subject to the provisions of the Zope Public License,
+# Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.
+# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
+# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
+# FOR A PARTICULAR PURPOSE.
+#
+##############################################################################
 from configparser import ConfigParser
 from shared.call import call
 from shared.path import change_dir
diff --git a/config/multi-call.py b/config/multi-call.py
index 0253135..bceae41 100644
--- a/config/multi-call.py
+++ b/config/multi-call.py
@@ -1,4 +1,16 @@
 #!/usr/bin/env python3
+##############################################################################
+#
+# Copyright (c) 2020 Zope Foundation and Contributors.
+#
+# This software is subject to the provisions of the Zope Public License,
+# Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.
+# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
+# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
+# FOR A PARTICULAR PURPOSE.
+#
+##############################################################################
 from shared.call import call
 from shared.packages import list_packages
 from shared.path import change_dir
diff --git a/config/re-enable-actions.py b/config/re-enable-actions.py
index be09079..1fe0041 100644
--- a/config/re-enable-actions.py
+++ b/config/re-enable-actions.py
@@ -1,4 +1,16 @@
-#!/bin/env python3
+#!/usr/bin/env python3
+##############################################################################
+#
+# Copyright (c) 2021 Zope Foundation and Contributors.
+#
+# This software is subject to the provisions of the Zope Public License,
+# Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.
+# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
+# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
+# FOR A PARTICULAR PURPOSE.
+#
+##############################################################################
 from shared.call import call
 from shared.packages import list_packages
 import argparse
diff --git a/config/shared/call.py b/config/shared/call.py
index 0b18ae7..fd16b5c 100644
--- a/config/shared/call.py
+++ b/config/shared/call.py
@@ -1,3 +1,15 @@
+##############################################################################
+#
+# Copyright (c) 2020 Zope Foundation and Contributors.
+#
+# This software is subject to the provisions of the Zope Public License,
+# Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.
+# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
+# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
+# FOR A PARTICULAR PURPOSE.
+#
+##############################################################################
 import subprocess
 import sys
 
diff --git a/config/shared/git.py b/config/shared/git.py
index 2cd648f..88f8c1d 100644
--- a/config/shared/git.py
+++ b/config/shared/git.py
@@ -1,3 +1,15 @@
+##############################################################################
+#
+# Copyright (c) 2022 Zope Foundation and Contributors.
+#
+# This software is subject to the provisions of the Zope Public License,
+# Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.
+# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
+# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
+# FOR A PARTICULAR PURPOSE.
+#
+##############################################################################
 from .call import call
 from .path import change_dir
 import pathlib
diff --git a/config/shared/packages.py b/config/shared/packages.py
index 83b1dcf..5dee802 100644
--- a/config/shared/packages.py
+++ b/config/shared/packages.py
@@ -1,3 +1,15 @@
+##############################################################################
+#
+# Copyright (c) 2021 Zope Foundation and Contributors.
+#
+# This software is subject to the provisions of the Zope Public License,
+# Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.
+# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
+# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
+# FOR A PARTICULAR PURPOSE.
+#
+##############################################################################
 import pathlib
 
 
diff --git a/config/shared/path.py b/config/shared/path.py
index 42a81c3..a1f83c7 100644
--- a/config/shared/path.py
+++ b/config/shared/path.py
@@ -1,3 +1,15 @@
+##############################################################################
+#
+# Copyright (c) 2020 Zope Foundation and Contributors.
+#
+# This software is subject to the provisions of the Zope Public License,
+# Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.
+# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
+# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
+# FOR A PARTICULAR PURPOSE.
+#
+##############################################################################
 import argparse
 import contextlib
 import os
diff --git a/config/shared/toml_encoder.py b/config/shared/toml_encoder.py
index a75b72c..e84625f 100644
--- a/config/shared/toml_encoder.py
+++ b/config/shared/toml_encoder.py
@@ -1,3 +1,15 @@
+##############################################################################
+#
+# Copyright (c) 2020 Zope Foundation and Contributors.
+#
+# This software is subject to the provisions of the Zope Public License,
+# Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.
+# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
+# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
+# FOR A PARTICULAR PURPOSE.
+#
+##############################################################################
 import toml