diff --git a/Gemfile b/Gemfile
index 5f0daab6..b6f811a5 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,3 +2,5 @@ source 'https://rubygems.org'
 
 # Specify your gem's dependencies in ruby-openid.gemspec
 gemspec
+
+gem 'rake'