rails_4.0.gemfile in seatbelt-0.5.0

- old
+ new

@@ -1,7 +1,7 @@
 source "https://rubygems.org"
 
 gem 'rubysl',                           :platforms => :rbx
 gem "jruby-openssl",                    :platforms => :jruby
-gem "rails", "4.0.2"
+gem "rails", "~>4.0"
 
 gemspec :path => "../"