diff --git a/CHANGELOG.md b/CHANGELOG.md
index da44d50..68a1dcc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,12 @@ file is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), and
 this project adheres to [Semantic
 Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+
+### Changed
+
+- Modified event structure to store NTLM error information.
+
 ## [0.15.2] - 2023-11-16
 
 ### Added