diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index 9791497f76..9ae6a6e7cb 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -22,6 +22,7 @@ Changelog
  * Added support for `azure-mgmt-cdn` version >= 10 and `azure-mgmt-frontdoor` version >= 1 in the frontend cache invalidator (Sylvain Fankhauser)
  * Add a system check to warn when a `django-storages` backend is configured to allow overwriting (Rishabh jain)
  * Update admin focus outline color to have higher contrast against white backgrounds (Thibaud Colas)
+ * Implement latest design for the admin dashboard header (Thibaud Colas, Steven Steinwand)
  * Fix: Make sure workflow timeline icons are visible in high-contrast mode (Loveth Omokaro)
  * Fix: Ensure authentication forms (login, password reset) have a visible border in Windows high-contrast mode (Loveth Omokaro)
  * Fix: Ensure visual consistency between buttons and links as buttons in Windows high-contrast mode (Albina Starykova)
@@ -58,6 +59,8 @@ Changelog
  * Fix: Fix check for `delete_url_name` attribute in generic `DeleteView` (Alex Simpson)
  * Fix: Re-implement design system colors so HSL values exactly match the desired RGB (Albina Starykova)
  * Fix: Resolve issue where workflow and other notification emails would not include the correct tab URL for account notification management (LB (Ben) Johnston)
+ * Fix: Use consistent spacing above and below page headers (Thibaud Colas)
+ * Fix: Use the correct icon sizes and spacing in slim header (Thibaud Colas)
  * Docs: Add custom permissions section to permissions documentation page (Dan Hayden)
  * Docs: Add documentation for how to get started with contributing translations for the Wagtail admin (Ogunbanjo Oluwadamilare)
  * Docs: Officially recommend `fnm` over `nvm` in development documentation (LB (Ben) Johnston)
diff --git a/docs/releases/4.2.md b/docs/releases/4.2.md
index 59155f50f9..10c0e4f94b 100644
--- a/docs/releases/4.2.md
+++ b/docs/releases/4.2.md
@@ -44,6 +44,7 @@ This feature was developed by Jake Howard.
  * Added support for `azure-mgmt-cdn` version >= 10 and `azure-mgmt-frontdoor` version >= 1 in the frontend cache invalidator (Sylvain Fankhauser)
  * Add a system check to warn when a `django-storages` backend is configured to allow overwriting (Rishabh jain)
  * Update admin focus outline color to have higher contrast against white backgrounds (Thibaud Colas)
+ * Implement latest design for the admin dashboard header (Thibaud Colas, Steven Steinwand)
 
 ### Bug fixes
 
@@ -82,6 +83,8 @@ This feature was developed by Jake Howard.
  * Fix check for `delete_url_name` attribute in generic `DeleteView` (Alex Simpson)
  * Re-implement design system colors so HSL values exactly match the desired RGB (Albina Starykova)
  * Resolve issue where workflow and other notification emails would not include the correct tab URL for account notification management (LB (Ben) Johnston)
+ * Use consistent spacing above and below page headers (Thibaud Colas)
+ * Use the correct icon sizes and spacing in slim header (Thibaud Colas)
 
 ### Documentation