diff --git a/CHANGELOG.rst b/CHANGELOG.rst
new file mode 100644
index 0000000..117d60d
--- /dev/null
+++ b/CHANGELOG.rst
@@ -0,0 +1,41 @@
+=========
+Changelog
+=========
+
+`2021.05 <https://github.com/python/python-docs-theme/releases/tag/v2021.05>`_
+------------------------------------------------------------------------------
+
+- Make the theme responsive (#46)
+   Contributed by Olga Bulat.
+- Use Python 3.8 for the Github Actions (#71)
+   Contributed by Stéphane Wirtel.
+- Use default pygments theme (#68)
+   Contributed by Aaron Carlisle.
+- Test Github action to validate the theme against docsbuild scripts. (#69)
+   Contributed by Julien Palard.
+- Add the copy button to pycon3 highlighted code blocks. (#64) 
+   Contributed by Julien Palard.
+
+
+`2020.12 <https://github.com/python/python-docs-theme/releases/tag/v2020.12>`_
+------------------------------------------------------------------------------
+
+- Updated the readme, to remind user to install the package in a virtual environment. (#41)
+   Contributed by Mariatta.
+- Updated the package url, using the GitHub repository instead of docs.python.org (#49) 
+   Contributed by Pradyun Gedam.
+- Added license information to the footer of the doc (#36)
+   Contributed by Todd.
+- Fixed typo in the footer (#52)
+   Contributed by Dominic Davis-Foster.
+- Added information on how to use the package (#32)
+   Contributed by Tapasweni Pathak.
+- Fixed code formatting (#53).
+   Contributed by Hugo van Kemenade.
+- Fixed code bgcolor and codetextcolor for Sphinx 3.1.0+ (#57)
+   Contributed by Zhiming Wang.
+
+`2018.2 <https://github.com/python/python-docs-theme/releases/tag/2018.2>`_
+---------------------------------------------------------------------------
+
+Initial release.
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..de11f32
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,7 @@
+[build-system]
+requires = [
+    "setuptools>=42",
+    "wheel"
+]
+build-backend = "setuptools.build_meta"
+
diff --git a/setup.py b/setup.py
index 0378da7..a74f3b6 100644
--- a/setup.py
+++ b/setup.py
@@ -13,7 +13,7 @@
     name='python-docs-theme',
     # Version is date based as year.month[.serial], where serial is used
     # if multiple releases are needed to address build failures.
-    version='2020.12.post1',
+    version='2021.05',
     description='The Sphinx theme for the CPython docs and related projects',
     long_description=long_description,
     author='PyPA',