Guardfile in mandrill-rails-1.1.1 vs Guardfile in mandrill-rails-1.2.0

@@ -1,8 +1,9 @@
 # A sample Guardfile
 # More info at https://github.com/guard/guard#readme
 
-guard 'rspec', :version => 2, :all_on_start => false, :all_after_pass => false do
+guard :rspec, cmd: "bundle exec rspec", all_on_start: false, all_after_pass: false  do
+
   watch(%r{^spec/.+_spec\.rb$})
   watch(%r{^lib/(.+)\.rb$})     { |m| "spec/lib/#{m[1]}_spec.rb" }
   watch('spec/spec_helper.rb')  { "spec" }
 
 end