diff --git a/CHANGELOG.md b/CHANGELOG.md
index d24ed0c1c09fc95668bd87624bed228b6b77b930..feec199998073420eb4f077963cd524c896e2152 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,19 @@
 # Change Log
 
+## v0.13.0 - 2022-06-02
+
+([full changelog](https://github.com/executablebooks/jupyter-book/compare/v0.12.3...a2d441633d5aafed4e94bbc544183cf866213f3a))
+
+This release contains some major UI and visual style upgrades for HTML output, and introduces some breaking changes in a few directives and in the structure of the HTML. See below for major changes.
+
+### New and Breaking ‼
+
+1. [#1442 Use Sphinx Design instead of Sphinx Panels](https://github.com/executablebooks/jupyter-book/pull/1442). We have migrated from [sphinx-panels](https://github.com/executablebooks/sphinx-panels) to [sphinx-design](https://github.com/executablebooks/sphinx-design), as `sphinx-panels` is no longer actively maintained. This also brings in several improvements to the same component functionality that was in sphinx-panels. See [the components documentation](https://jupyterbook.org/en/latest/content/components.html) for more information on upgrades and usage.
+2. [#1679 Update Sphinx Book Theme to v0.3](https://github.com/executablebooks/jupyter-book/pull/1679). This brings in several major upgrades to the theme's behavior and structure. It significantly changes the structure of the output HTML (in particular, the sidebars and article header), so if you defined custom CSS rules, double-check that they still apply correctly.
+
+   See [the Book Theme release notes](https://github.com/executablebooks/sphinx-book-theme/releases/tag/v0.3.0) as well as [the Book Theme changelog](https://github.com/executablebooks/sphinx-book-theme/blob/master/CHANGELOG.md#v030---2022-03-25) for more information.
+3. [#1693 Removes support for `sphinx<=4`](https://github.com/executablebooks/jupyter-book/pull/1693). This will likely only be applicable to you if you were explicitly pinning Sphinx to a version less than 4.
+
 ## v0.12.3 - 2022-03-28
 
 ([full changelog](https://github.com/executablebooks/jupyter-book/compare/v0.12.2...5e12cb324afca1192f2354689d9d5755329e1c9d))
diff --git a/jupyter_book/__init__.py b/jupyter_book/__init__.py
index 95f485852a6ff7cf28fcbc7ea4cf1dff4bd1f475..ef921db8b6154f88eeb91151d78028a3762b0d90 100644
--- a/jupyter_book/__init__.py
+++ b/jupyter_book/__init__.py
@@ -1,6 +1,6 @@
 """Build a book with Jupyter Notebooks and Sphinx."""
 
-__version__ = "0.12.3"
+__version__ = "0.13.0"
 
 
 # We connect this function to the step after the builder is initialized