diff --git a/Gemfile b/Gemfile
index d296794..57060e3 100644
--- a/Gemfile
+++ b/Gemfile
@@ -3,3 +3,7 @@ source 'https://rubygems.org'
 gemspec
 
 gem 'rake'
+
+group :test do
+  gem 'mail'
+end