diff --git a/CHANGELOG.md b/CHANGELOG.md
index c6735f5..f22241c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,10 +8,10 @@ The format is based on [Keep a Changelog] and this project adheres to [Semantic
   [Semantic Versioning]: http://semver.org/spec/v2.0.0.html
 
 ## [Unreleased]
-### Fixed
-- Fixed compatibility with older rubies
+### Changed
+- Restrict to Ruby 2.3+
 
-  [Unreleased]: https://github.com/sj26/rspec_junit_formatter/compare/v0.4.0...main
+  [Unreleased]: https://github.com/sj26/rspec_junit_formatter/compare/v0.5.1...main
 
 ## [v0.5.1] - 2022-01-06
 ### Fixed
diff --git a/rspec_junit_formatter.gemspec b/rspec_junit_formatter.gemspec
index a70832e..f803a61 100644
--- a/rspec_junit_formatter.gemspec
+++ b/rspec_junit_formatter.gemspec
@@ -9,7 +9,7 @@ Gem::Specification.new do |s|
   s.description = "RSpec results that your continuous integration service can read."
   s.license     = "MIT"
 
-  s.required_ruby_version = ">= 2.0.0"
+  s.required_ruby_version = ">= 2.3.0"
   s.required_rubygems_version = ">= 2.0.0"
 
   s.metadata = {