diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3c799240..d13768fd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,12 +10,18 @@ The format is based on [Keep a Changelog], and this project adheres to
 
 ## [Unreleased]
 
+### Added
+
+- Allow the use of [commander](https://github.com/commander-rb/commander)
+  major version 6 ([#403]).
+
 ### Fixed
 
 - Resolve lint issues identified by RuboCop. ([#401])
 
 [Unreleased]: https://github.com/envato/stack_master/compare/v2.18.0...HEAD
 [#401]: https://github.com/envato/stack_master/pull/401
+[#403]: https://github.com/envato/stack_master/pull/403
 
 ## [2.18.0] - 2026-02-02
 
diff --git a/stack_master.gemspec b/stack_master.gemspec
index 42544265..0d1f05aa 100644
--- a/stack_master.gemspec
+++ b/stack_master.gemspec
@@ -38,7 +38,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency 'rubocop'
   spec.add_dependency 'os'
   spec.add_dependency 'ruby-progressbar'
-  spec.add_dependency 'commander', '>= 4.6.0', '< 6'
+  spec.add_dependency 'commander', '>= 4.6.0', '< 7'
   spec.add_dependency 'aws-sdk-acm', '~> 1'
   spec.add_dependency 'aws-sdk-cloudformation', '~> 1'
   spec.add_dependency 'aws-sdk-ec2', '~> 1'