gemfiles/rails42.gemfile in rollbar-2.22.1 vs gemfiles/rails42.gemfile in rollbar-2.23.0

@@ -25,9 +25,13 @@
   gem 'racc'
   gem 'rubinius-developer_tools'
   gem 'rubysl', '~> 2.0' unless RUBY_VERSION.start_with?('1')
 end
 
+if RUBY_VERSION < '2.0.0'
+  gem 'json', '1.8.6'
+end
+
 if RUBY_VERSION < '2.2.2'
   gem 'sidekiq', '~> 2.13.0'
 else
   gem 'sidekiq', '>= 2.13.0'
 end