diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index ae129d466b..33a16e7ba1 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -9,6 +9,7 @@ Changelog
  * Change comment headers’ date formatting to use browser APIs instead of requiring a library (LB (Ben Johnston))
  * Lint with flake8-comprehensions and flake8-assertive (Mads Jensen)
  * Switch the Wagtail branding font to a system font stack (Steven Steinwand)
+ * Add black configuration and reformat code using it (Dan Braghis)
 
 
 2.16.1 (11.02.2022)
diff --git a/docs/releases/2.17.md b/docs/releases/2.17.md
index c8d1d1a24b..4e052ac056 100644
--- a/docs/releases/2.17.md
+++ b/docs/releases/2.17.md
@@ -20,6 +20,7 @@ Here are other changes related to the redesign:
  * Major updates to frontend tooling; move Node tooling from Gulp to Webpack, upgrade to Node v16 and npm v8, eslint v8, stylelint v14 and others (Thibaud Colas)
  * Change comment headers’ date formatting to use browser APIs instead of requiring a library (LB (Ben Johnston))
  * Lint with flake8-comprehensions and flake8-assertive (Mads Jensen)
+ * Add black configuration and reformat code using it (Dan Braghis)
 
 
 ### Bug fixes