Gemfile in active-triples-0.9.0 vs Gemfile in active-triples-0.10.0

@@ -1,5 +1,6 @@
 source "https://rubygems.org"
 
 gemspec
 
+gem 'activesupport', '< 5.0.0' if RUBY_VERSION =~ /2\.1\..*/
 gem 'pry-byebug' unless ENV["CI"]