diff --git a/docs/releasenotes.rst b/docs/releasenotes.rst
index 2a2279f6c7e346664b5b9aaca3ac5d55d7a97a92..2ce40fce8bb397fd066bd07a69b0e8352eb0095c 100644
--- a/docs/releasenotes.rst
+++ b/docs/releasenotes.rst
@@ -37,6 +37,11 @@ Dropped support for Debian 10 (Buster).
     renamed to ``pip_check_requirements`` /
     ``pip_check_requirements_in``.
 
+  * Parameter ``maintenance_allowed_hosts`` has been dropped and
+    replaced with parameter ``maintenance_allowed_sources``. The new
+    parameter expects a list of IPv4 and IPv6 addresses (or
+    subnets). Resolvable names can no longer be specified.
+
 * ``wsgi_website`` role
 
   * Dropped support for Python 2.7. Only Python 3 is supported now.