Gemfile in blacklight-6.7.3 vs Gemfile in blacklight-6.8.0

@@ -34,9 +34,10 @@
   case ENV['RAILS_VERSION']
   when /^4.2/
     gem 'responders', '~> 2.0'
     gem 'sass-rails', '>= 5.0'
     gem 'coffee-rails', '~> 4.1.0'
+    gem 'json', '~> 1.8'
   when /^4.[01]/
     gem 'sass-rails', '< 5.0'
   end
 end
 # END ENGINE_CART BLOCK