roo.gemspec in roo-2.6.0 vs roo.gemspec in roo-2.7.0

@@ -20,6 +20,7 @@
   spec.add_dependency 'nokogiri', '~> 1'
   spec.add_dependency 'rubyzip', '~> 1.1', '< 2.0.0'
 
   spec.add_development_dependency 'rake', '~> 10.1'
   spec.add_development_dependency 'minitest', '~> 5.4', '>= 5.4.3'
+  spec.add_development_dependency 'rack', '~> 1.6', '< 2.0.0'
 end