representable.gemspec in representable-1.5.1 vs representable.gemspec in representable-1.5.2

@@ -27,6 +27,7 @@
   s.add_development_dependency "minitest", "~> 5.0.0"
   s.add_development_dependency "mocha", ">= 0.13.0"
   s.add_development_dependency "mongoid"
   s.add_development_dependency "virtus", "~> 0.5.0"
   s.add_development_dependency "yajl-ruby"
+  s.add_development_dependency "json", '~> 1.7.7'
 end