diff --git a/upgrade.txt b/upgrade.txt
index 0f6b475e9..4ee9ede3e 100644
--- a/upgrade.txt
+++ b/upgrade.txt
@@ -4,6 +4,7 @@ information provided here is intended especially for developers.
 === 3.9.5 ===
 
 - Several functions inside AddonNotificationsProvider have been modified to accept an "options" parameter instead of having several optional parameters.
+- Schemas are now registered using Angular providers with the CORE_SITE_SCHEMAS injection token instead of CoreSitesProvider.registerSiteSchema.
 
 === 3.9.3 ===