diff --git a/CHANGELOG.md b/CHANGELOG.md
index 72664f7..8610475 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,7 +3,11 @@ All notable changes to this project will be documented in this file.
  
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
- 
+
+## [0.6b] - 2020-11-12
+### Fixed
+- Fix port numbers for ACK and OFFER are not correct #1
+
 ## [0.6a] - 2020-09-27
 ### Added
 -  Open UDP socket to prevent ICMP Destination unreachable (Port unreachable) [0.6]