diff --git a/.travis.yml b/.travis.yml
index cac7a29..d9754cf 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,14 +2,12 @@ before_install:
   - gem install bundler
 language: ruby
 rvm:
-  - '1.9'
-  - '2.0'
-  - '2.1'
-  - '2.2'
-  - '2.3.0'
+  - '2.3'
+  - '2.4'
+  - '2.5'
+  - '2.6'
   - ruby-head
 matrix:
   allow_failures:
     - rvm: ruby-head
   fast_finish: true
-
diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..d5f46a6
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,9 @@
+# Changelog
+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/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+### Removed
+- This gem will no longer run on Ruby versions < 2.3
diff --git a/zxcvbn-ruby.gemspec b/zxcvbn-ruby.gemspec
index 5a27e30..4b8aa4f 100644
--- a/zxcvbn-ruby.gemspec
+++ b/zxcvbn-ruby.gemspec
@@ -16,6 +16,8 @@ Gem::Specification.new do |gem|
   gem.version       = Zxcvbn::VERSION
   gem.license       = 'MIT'
 
+  gem.required_ruby_version = '~> 2.3'
+
   gem.add_development_dependency 'therubyracer'
   gem.add_development_dependency 'rspec'
 end