diff --git a/CHANGES.rst b/CHANGES.rst
index 4aff744c..a2592c55 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -4,6 +4,8 @@ Version 3.0.0
 Unreleased
 
 -   Remove previously deprecated code. :pr:`5223`
+-   Restructure the code such that the Flask (app) and Blueprint
+    classes have Sans-IO bases. :pr:`5127`
 
 
 Version 2.3.3