diff --git a/templates/zerver/api/changelog.md b/templates/zerver/api/changelog.md
index 926e03944d..a2b4d71d9f 100644
--- a/templates/zerver/api/changelog.md
+++ b/templates/zerver/api/changelog.md
@@ -20,6 +20,16 @@ format used by the Zulip server that they are interacting with.
 
 ## Changes in Zulip 6.0
 
+**Feature level 143**
+
+* `PATCH /realm`: The `disallow_disposable_email_addresses`,
+  `emails_restricted_to_domains`, `invite_required`, and
+  `waiting_period_threshold` settings can no longer be changed by
+  organization administrators who are not owners.
+* `PATCH /realm/domains`, `POST /realm/domains`, `DELETE
+  /realm/domains`: Organization administrators who are not owners can
+  no longer access these endpoints.
+
 **Feature level 142**
 
 * [`GET users/me/subscriptions`](/api/get-subscriptions), [`GET
diff --git a/version.py b/version.py
index 3acc51e97e..d0fd1fe1d3 100644
--- a/version.py
+++ b/version.py
@@ -33,7 +33,7 @@ DESKTOP_WARNING_VERSION = "5.4.3"
 # Changes should be accompanied by documentation explaining what the
 # new level means in templates/zerver/api/changelog.md, as well as
 # "**Changes**" entries in the endpoint's documentation in `zulip.yaml`.
-API_FEATURE_LEVEL = 142
+API_FEATURE_LEVEL = 143
 
 # Bump the minor PROVISION_VERSION to indicate that folks should provision
 # only when going from an old version of the code to a newer version. Bump