karel-interpreter.gemspec in karel-interpreter-0.1.0 vs karel-interpreter.gemspec in karel-interpreter-0.2.0

@@ -19,8 +19,9 @@
   spec.bindir        = "exe"
   spec.executables   = ["karel"]
   spec.require_paths = ["lib"]
 
   spec.add_development_dependency "bundler", "~> 1.16"
+  spec.add_development_dependency "json", "~> 2.1"
   spec.add_development_dependency "rake", "~> 10.0"
   spec.add_development_dependency "rspec", "~> 3.0"
 end