diff --git a/.editorconfig b/.editorconfig
index 5094013..e62eec2 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -1,5 +1,5 @@
-# Generated from:
-# https://github.com/zopefoundation/meta/tree/master/config/c-code
+# Generated with zope.meta (https://zopemeta.readthedocs.io/) from:
+# https://github.com/zopefoundation/meta/tree/master/src/zope/meta/c-code
 #
 # EditorConfig Configuration file, for more details see:
 # https://EditorConfig.org
@@ -12,7 +12,7 @@
 root = true
 
 
-[*]  # For All Files
+[*]
 # Unix-style newlines with a newline ending every file
 end_of_line = lf
 insert_final_newline = true
diff --git a/.github/workflows/pre-commit.yml b/.github/workflows/pre-commit.yml
index 8f2ad3c..c0f89ee 100644
--- a/.github/workflows/pre-commit.yml
+++ b/.github/workflows/pre-commit.yml
@@ -1,5 +1,5 @@
-# Generated from:
-# https://github.com/zopefoundation/meta/tree/master/config/c-code
+# Generated with zope.meta (https://zopemeta.readthedocs.io/) from:
+# https://github.com/zopefoundation/meta/tree/master/src/zope/meta/c-code
 name: pre-commit
 
 on:
@@ -21,7 +21,7 @@ jobs:
     name: linting
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - uses: actions/setup-python@v6
       with:
         python-version: '3.13'
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 52bb52c..21e20ba 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -1,5 +1,5 @@
-# Generated from:
-# https://github.com/zopefoundation/meta/tree/master/config/c-code
+# Generated with zope.meta (https://zopemeta.readthedocs.io/) from:
+# https://github.com/zopefoundation/meta/tree/master/src/zope/meta/c-code
 ###
 # Initially copied from
 # https://github.com/actions/starter-workflows/blob/main/ci/python-package.yml
@@ -106,7 +106,7 @@ jobs:
 
     steps:
       - name: checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           persist-credentials: false
       - name: Set up Python ${{ matrix.python-version }}
@@ -262,7 +262,7 @@ jobs:
 
     steps:
       - name: checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           persist-credentials: false
       - name: Set up Python ${{ matrix.python-version }}
@@ -378,7 +378,7 @@ jobs:
 
     steps:
       - name: checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           persist-credentials: false
       - name: Set up Python ${{ matrix.python-version }}
@@ -456,7 +456,7 @@ jobs:
             python-version: "3.13"
     steps:
       - name: checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           persist-credentials: false
       - name: Set up Python ${{ matrix.python-version }}
@@ -539,8 +539,12 @@ jobs:
     if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags')
     # Wait for both build jobs to complete
     needs: [build-package, manylinux]
+    environment:
+      name: pypi
+      url: https://pypi.org/p/ExtensionClass
     permissions:
       contents: read
+      id-token: write  # Mandatory for trusted publishing
 
     steps:
       - name: Download all wheel artifacts
@@ -570,8 +574,6 @@ jobs:
       - name: Publish to PyPI
         uses: pypa/gh-action-pypi-publish@release/v1
         with:
-          user: __token__
-          password: ${{ secrets.TWINE_PASSWORD }}
           skip-existing: true
           packages-dir: dist/
           verbose: true
diff --git a/.gitignore b/.gitignore
index 6e5e8ef..07212fd 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,5 @@
-# Generated from:
-# https://github.com/zopefoundation/meta/tree/master/config/c-code
+# Generated with zope.meta (https://zopemeta.readthedocs.io/) from:
+# https://github.com/zopefoundation/meta/tree/master/src/zope/meta/c-code
 *.dll
 *.egg-info/
 *.profraw
diff --git a/.manylinux-install.sh b/.manylinux-install.sh
index f2dee1c..47ef951 100755
--- a/.manylinux-install.sh
+++ b/.manylinux-install.sh
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
-# Generated from:
-# https://github.com/zopefoundation/meta/tree/master/config/c-code
+# Generated with zope.meta (https://zopemeta.readthedocs.io/) from:
+# https://github.com/zopefoundation/meta/tree/master/src/zope/meta/c-code
 
 set -e -x
 
diff --git a/.manylinux.sh b/.manylinux.sh
index ea4ef41..77f3c74 100755
--- a/.manylinux.sh
+++ b/.manylinux.sh
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
-# Generated from:
-# https://github.com/zopefoundation/meta/tree/master/config/c-code
+# Generated with zope.meta (https://zopemeta.readthedocs.io/) from:
+# https://github.com/zopefoundation/meta/tree/master/src/zope/meta/c-code
 
 set -e -x
 
diff --git a/.meta.toml b/.meta.toml
index 5575419..4badfec 100644
--- a/.meta.toml
+++ b/.meta.toml
@@ -1,8 +1,8 @@
-# Generated from:
-# https://github.com/zopefoundation/meta/tree/master/config/c-code
+# Generated with zope.meta (https://zopemeta.readthedocs.io/) from:
+# https://github.com/zopefoundation/meta/tree/master/src/zope/meta/c-code
 [meta]
 template = "c-code"
-commit-id = "9fcd3d67"
+commit-id = "780d7481"
 
 [python]
 with-windows = true
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 2a52c5c..e120a3d 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,5 +1,5 @@
-# Generated from:
-# https://github.com/zopefoundation/meta/tree/master/config/c-code
+# Generated with zope.meta (https://zopemeta.readthedocs.io/) from:
+# https://github.com/zopefoundation/meta/tree/master/src/zope/meta/c-code
 minimum_pre_commit_version: '3.6'
 repos:
   - repo: https://github.com/pycqa/isort
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 5242e6a..bab7f94 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -1,6 +1,6 @@
 <!--
-Generated from:
-https://github.com/zopefoundation/meta/tree/master/config/c-code
+Generated with zope.meta (https://zopemeta.readthedocs.io/) from:
+https://github.com/zopefoundation/meta/tree/master/src/zope/meta/c-code
 -->
 # Contributing to zopefoundation projects
 
diff --git a/MANIFEST.in b/MANIFEST.in
index b4ca4f0..a5a95df 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,5 +1,5 @@
-# Generated from:
-# https://github.com/zopefoundation/meta/tree/master/config/c-code
+# Generated with zope.meta (https://zopemeta.readthedocs.io/) from:
+# https://github.com/zopefoundation/meta/tree/master/src/zope/meta/c-code
 include *.md
 include *.rst
 include *.txt
diff --git a/pyproject.toml b/pyproject.toml
index 8cbcdc4..53f0400 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,5 @@
-# 
-# Generated from:
-# https://github.com/zopefoundation/meta/tree/master/config/c-code
+# Generated with zope.meta (https://zopemeta.readthedocs.io/) from:
+# https://github.com/zopefoundation/meta/tree/master/src/zope/meta/c-code
 
 [build-system]
 requires = [
@@ -11,9 +10,8 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "ExtensionClass"
-version = "6.3.dev0"
+version = "6.2.1a2"
 description = "Metaclass for subclassable extension types"
-readme = "README.rst"
 requires-python = ">=3.10"
 license = "ZPL-2.1"
 authors = [
@@ -39,6 +37,7 @@ classifiers = [
   "Programming Language :: Python :: Implementation :: CPython",
   "Programming Language :: Python :: Implementation :: PyPy",
 ]
+dynamic = ["readme"]
 dependencies = []
 
 [project.optional-dependencies]
@@ -79,3 +78,6 @@ source = [
     ".tox/*/lib/python*/site-packages/",
     ".tox/pypy*/site-packages/",
 ]
+
+[tool.setuptools.dynamic]
+readme = {file = ["README.rst", "CHANGES.rst"]}
diff --git a/setup.cfg b/setup.cfg
index 28848f0..38a6e41 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,5 +1,5 @@
-# Generated from:
-# https://github.com/zopefoundation/meta/tree/master/config/c-code
+# Generated with zope.meta (https://zopemeta.readthedocs.io/) from:
+# https://github.com/zopefoundation/meta/tree/master/src/zope/meta/c-code
 
 [zest.releaser]
 create-wheel = no
diff --git a/tox.ini b/tox.ini
index 4aa3acc..96c432b 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
-# Generated from:
-# https://github.com/zopefoundation/meta/tree/master/config/c-code
+# Generated with zope.meta (https://zopemeta.readthedocs.io/) from:
+# https://github.com/zopefoundation/meta/tree/master/src/zope/meta/c-code
 [tox]
 minversion = 4.0
 envlist =