Gemfile in sprockets-sass-1.3.1 vs Gemfile in sprockets-sass-2.0.0.beta1

@@ -1,2 +1,7 @@
 source 'https://rubygems.org'
+
 gemspec
+
+if RUBY_VERSION < "2.2.0"
+  gem 'rack', '>= 1.0', '< 2.0'
+end