Gemfile in keen-0.7.2 vs Gemfile in keen-0.7.3

@@ -6,9 +6,11 @@
   gem 'rake'
   gem 'rspec'
   gem 'em-http-request'
   gem 'em-synchrony', :require => false
   gem 'webmock'
+  # ensure a reasonable json so multi_json doesn't complain
+  gem 'json', '~> 1.7.7'
 end
 
 group :development do
   # guard cross-platform listener trick
   gem 'rb-inotify', :require => false