diff --git a/Gemfile b/Gemfile
index ef4addada..4364afb30 100755
--- a/Gemfile
+++ b/Gemfile
@@ -12,6 +12,7 @@ gem "onstomp" # for stomp protocol, Apache 2.0 License
 gem "json" # Ruby license
 #gem "awesome_print" # MIT License
 gem "jruby-openssl", :platforms => :jruby # For enabling SSL support, CPL/GPL 2.0
+gem "mail" #outputs/email, # License: MIT License
 
 gem "minitest" # License: Ruby
 gem "rack" # License: MIT
diff --git a/logstash.gemspec b/logstash.gemspec
index 2dd331d7b..455bd8a66 100755
--- a/logstash.gemspec
+++ b/logstash.gemspec
@@ -48,6 +48,7 @@ Gem::Specification.new do |spec|
   spec.add_dependency "stomp" # for stomp protocol, Apache 2.0 License
   spec.add_dependency "uuidtools" # for naming amqp queues, License ???
   spec.add_dependency "xmpp4r", "~> 0.5" # outputs/xmpp, # License: As-Is
+  spec.add_dependency "mail" #outputs/email, # License: MIT License
 
   spec.add_dependency("ffi-rzmq")
   spec.add_development_dependency 'mocha'