diff --git a/doc/whats-new.rst b/doc/whats-new.rst
index 4cd34c4cf54..8303113600b 100644
--- a/doc/whats-new.rst
+++ b/doc/whats-new.rst
@@ -26,6 +26,7 @@ New Features
 
 Breaking changes
 ~~~~~~~~~~~~~~~~
+- Support for ``python 3.9`` has been dropped (:pull:`8937`)
 
 
 Deprecations