Gemfile in github-ds-0.2.8 vs Gemfile in github-ds-0.2.9

@@ -1,6 +1,12 @@
 source "https://rubygems.org"
 gemspec
 
 DEFAULT_RAILS_VERSION = '5.0.2'
+
+if ENV['RAILS_VERSION'] = '4.2.10'
+  gem 'mysql2', '~> 0.3.18'
+else
+  gem "mysql2"
+end
 gem "rails", "~> #{ENV['RAILS_VERSION'] || DEFAULT_RAILS_VERSION}"
 gem "activerecord", "~> #{ENV['RAILS_VERSION'] || DEFAULT_RAILS_VERSION}"