diff --git a/Gemfile b/Gemfile
index 7c7a1cf..6134a7f 100644
--- a/Gemfile
+++ b/Gemfile
@@ -31,3 +31,6 @@ if RUBY_VERSION >= '1.8.7' and RUBY_VERSION < '1.9'
   gem 'rake', '~> 10.0'
 end
 
+if RUBY_VERSION >= '1.8.7' and RUBY_VERSION < '2.0'
+  gem 'json', '~> 1.0'
+end