diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3221e1b..069a114 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Changelog
 
+## [2025.12](https://github.com/python/python-docs-theme/releases/tag/2025.12)
+
+* Add support for green, red and yellow side borders for code examples by @hugovk in https://github.com/python/python-docs-theme/pull/285
+* Add Portuguese translation by @NyaPuma in https://github.com/python/python-docs-theme/pull/281
+* Add support for Python 3.15 by @hugovk in https://github.com/python/python-docs-theme/pull/282
+* Convert CHANGELOG and CONTRIBUTING from .rst to .md by @hugovk in https://github.com/python/python-docs-theme/pull/277
+* Add zizmor to CI and fix findings by @hugovk in https://github.com/python/python-docs-theme/pull/283
+
 ## [2025.10](https://github.com/python/python-docs-theme/releases/tag/2025.10)
 
 * Add Romanian translation by @octaG-M in https://github.com/python/python-docs-theme/pull/272
diff --git a/python_docs_theme/__init__.py b/python_docs_theme/__init__.py
index e5d1acf..a6c8f18 100644
--- a/python_docs_theme/__init__.py
+++ b/python_docs_theme/__init__.py
@@ -11,7 +11,7 @@
     from sphinx.application import Sphinx
     from sphinx.util.typing import ExtensionMetadata
 
-__version__ = "2025.10"
+__version__ = "2025.12"
 
 THEME_PATH = Path(__file__).resolve().parent
 LOCALE_DIR = THEME_PATH / "locale"