Gemfile in aruba-0.14.12 vs Gemfile in aruba-0.14.13

@@ -68,10 +68,16 @@
     gem 'yard', '~> 0.9.11'
     gem 'kramdown', '~> 1.7.0'
   end
 
   # Code Coverage
-  gem 'simplecov', '~> 0.10' unless RUBY_PLATFORM.include?('java')
+  unless RUBY_PLATFORM.include?('java')
+    gem 'simplecov', '~> 0.10' 
+    if RUBY_VERSION < '2.0.0'
+      gem 'json', '< 2.3.0'
+    end
+  end
+
 
   # Test api
   gem 'rspec', '~> 3.4'
   gem 'fuubar', '~> 2.0'