diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index b3a67d83ed..60b43a0608 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -5,6 +5,7 @@ Changelog
 ~~~~~~~~~~~~~~~~
 
  * Add formal support for Django 5.1 (Matt Westcott)
+ * Formalize support for MariaDB (Sage Abdullah)
  * Redirect to the last viewed listing page after deleting form submissions (Matthias Brück)
  * Provide `getTextLabel` method on date / time StreamField blocks (Vaughn Dickson)
  * Purge frontend cache when modifying redirects (Jake Howard)
diff --git a/README.md b/README.md
index 036ffd9e9f..b98fc7fa01 100644
--- a/README.md
+++ b/README.md
@@ -86,7 +86,7 @@ Wagtail supports:
 
 -   Django 4.2.x, 5.0.x and 5.1.x
 -   Python 3.9, 3.10, 3.11 and 3.12
--   PostgreSQL, MySQL and SQLite (with JSON1) as database backends
+-   PostgreSQL, MySQL, MariaDB and SQLite (with JSON1) as database backends
 
 [Previous versions of Wagtail](https://docs.wagtail.org/en/stable/releases/upgrading.html#compatible-django-python-versions) additionally supported Python 2.7, 3.8 and earlier Django versions.
 
diff --git a/docs/advanced_topics/performance.md b/docs/advanced_topics/performance.md
index cceade7003..4830c362d5 100644
--- a/docs/advanced_topics/performance.md
+++ b/docs/advanced_topics/performance.md
@@ -88,7 +88,7 @@ For details on configuring Wagtail for Elasticsearch, see [](wagtailsearch_backe
 
 ## Database
 
-Wagtail is tested on PostgreSQL, SQLite, and MySQL. It may work on some third-party database backends as well, but this is not guaranteed.
+Wagtail is tested on PostgreSQL, SQLite, MySQL and MariaDB. It may work on some third-party database backends as well, but this is not guaranteed.
 
 We recommend PostgreSQL for production use, however, the choice of database ultimately depends on a combination of factors, including personal preference, team expertise, and specific project requirements. The most important aspect is to ensure that your selected database can meet the performance and scalability requirements of your project.
 
diff --git a/docs/releases/6.3.md b/docs/releases/6.3.md
index da275b3d1e..b43764273f 100644
--- a/docs/releases/6.3.md
+++ b/docs/releases/6.3.md
@@ -17,6 +17,7 @@ This release adds formal support for Django 5.1.
 
 ### Other features
 
+ * Formalize support for MariaDB (Sage Abdullah)
  * Redirect to the last viewed listing page after deleting form submissions (Matthias Brück)
  * Provide `getTextLabel` method on date / time StreamField blocks (Vaughn Dickson)
  * Purge frontend cache when modifying redirects (Jake Howard)