diff --git a/CHANGELOG.md b/CHANGELOG.md
index 99ba2d56..263f1089 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,12 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
+## [6.3.1] - 2025-11-25
+
+## What's New
+
+- Add script to help estimate token savings from on-the-fly replacements
+
 ## [6.3.0] - 2025-11-25
 
 ## What's New