diff --git a/docs/en/03_Upgrading/01_Upgrading_project.md b/docs/en/03_Upgrading/01_Upgrading_project.md
index 2604da77a..728c64617 100644
--- a/docs/en/03_Upgrading/01_Upgrading_project.md
+++ b/docs/en/03_Upgrading/01_Upgrading_project.md
@@ -25,7 +25,8 @@ How easy will it be to update my project? It's a fair question, and sometimes a
 
 There are some fundamental changes in SilverStripe 4:
 
-* PHP 7.1 is now the minimum required version for SilverStripe 4.5.0 and above and up to PHP 7.3 is supported. We strongly recommend you only use [supported versions of PHP](https://www.php.net/supported-versions.php). Note: SilverStripe 4.0.0 through 4.4.0 still support PHP 5.6.
+* PHP 7.1 is now the minimum required version for SilverStripe 4.5.0 and above. We strongly recommend you only use [supported versions of PHP](https://www.php.net/supported-versions.php). Note: SilverStripe 4.0.0 through 4.4.0 still support PHP 5.6.
+* PHP 7.4 is supported from SilverStripe 4.5.3 and above.
 * SilverStripe is now even more modular which allows you to remove functionality your project might not need.
 * Common functionality sets can now be installed via SilverStripe _recipes_.
 * SilverStripe modules can now be installed in the `vendor/` folder along with your regular PHP packages.
diff --git a/docs/en/04_Changelogs/4.6.0.md b/docs/en/04_Changelogs/4.6.0.md
index 903eec320..d5c957550 100644
--- a/docs/en/04_Changelogs/4.6.0.md
+++ b/docs/en/04_Changelogs/4.6.0.md
@@ -8,6 +8,7 @@
  * [Solr no longer indexes draft/restricted content](#solr-updates)
  * [Simplify customisation of ModelAdmin](#modeladmin-customisation)
  * [Login forms module ships with installer](#loginforms)
+ * [PHP 7.4 compatibility](#php7-4)
 
 ## Security patches
 
@@ -334,6 +335,10 @@ login form.
 
 View the [Silverstripe Login Forms readme](https://github.com/silverstripe/silverstripe-login-forms) on Github for more details.
 
+## PHP 7.4 compatibility {#php7-4}
+
+This release supports PHP 7.4, as does version 4.5.3 which was released at the same time. At the time of this release, all [commercially supported modules](https://www.silverstripe.org/software/addons/silverstripe-commercially-supported-module-list/) also support PHP 7.4.
+
 ## Regressions
 
 - [File section, icons broken until page is refreshed](https://github.com/silverstripe/silverstripe-admin/issues/1064)