Gemfile in tax_generator-0.6.2 vs Gemfile in tax_generator-0.6.3

@@ -1,3 +1,7 @@
 source 'http://rubygems.org'
 
 gemspec
+
+if RUBY_VERSION < "2.2.0"
+  gem 'activesupport', '>= 4.0', '< 5.0'
+end