diff --git a/Gemfile b/Gemfile
index 5ce94b0..8221837 100644
--- a/Gemfile
+++ b/Gemfile
@@ -5,3 +5,4 @@ gem 'puppet', puppetversion
 gem 'puppetlabs_spec_helper', '>= 0.8.2'
 gem 'puppet-lint', '>= 1.0.0'
 gem 'facter', '>= 1.7.0'
+gem 'metadata-json-lint'