diff --git a/Gemfile b/Gemfile
index 6af13c7..b05b687 100644
--- a/Gemfile
+++ b/Gemfile
@@ -5,6 +5,7 @@ gem 'savon'
 gem 'builder'
 gem 'activemodel', '~> 3.0.20'
 gem 'activesupport', '~> 3.0.20'
+gem 'nokogiri'
 
 gem 'savon_spec', :groups => [:test, :development]
 gem 'rspec', "2.12", :groups => [:test, :development]