diff --git a/Gemfile b/Gemfile
index bd0bad4bb..2482aa9f9 100644
--- a/Gemfile
+++ b/Gemfile
@@ -18,6 +18,7 @@ gem "actionpack-xml_parser"
 gem "roadie-rails", "~> 1.1.1"
 gem "roadie", "~> 3.2.1"
 gem "mimemagic"
+gem "mail", "~> 2.6.6"
 
 gem "nokogiri", (RUBY_VERSION >= "2.1" ? "~> 1.7.2" : "~> 1.6.8")
 gem "i18n", "~> 0.7.0"