diff --git a/CHANGES.rst b/CHANGES.rst
index 4b1f787..9d15911 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -3,6 +3,12 @@ Changes
 =======
 
 
+6.0.0b1 (2023-04-25)
+--------------------
+
+- Set 429 as the default lockout response code. [hirotasoshu]
+
+
 5.41.1 (2023-04-16)
 -------------------