diff --git a/.gitignore b/.gitignore
index 528d180..a20bfce 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
+.idea
 coverage/*
 test/client/coverage/*
 test/coverage/*
diff --git a/.travis.yml b/.travis.yml
new file mode 100644
index 0000000..eaf2731
--- /dev/null
+++ b/.travis.yml
@@ -0,0 +1,3 @@
+language: ruby
+rvm:
+  - 2.0.0
\ No newline at end of file
diff --git a/Gemfile b/Gemfile
index ffe0b1c..1181f98 100644
--- a/Gemfile
+++ b/Gemfile
@@ -7,6 +7,7 @@ source "http://rubygems.org"
   gem 'awesome_print'
   gem 'yard'
   gem 'bluecloth'
+  gem 'test-unit'
 
 # Specify your gem's dependencies in stamps.gemspec
 gemspec
diff --git a/README.md b/README.md
index fd037c8..1061863 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-Stamps
+Stamps [![Build Status](https://travis-ci.org/mattsears/stamps.svg?branch=master)](https://travis-ci.org/mattsears/stamps)
 ==========
 
 Stamps is Stamps.com backed library for creating postage labels,
diff --git a/lib/stamps/mapping.rb b/lib/stamps/mapping.rb
index 08f48f0..debe495 100644
--- a/lib/stamps/mapping.rb
+++ b/lib/stamps/mapping.rb
@@ -84,13 +84,15 @@ class Rate < Hashie::Trash
       # Maps :rate to AddOns map
       def add_ons=(addons)
         self[:AddOns] = AddOnsArray.new(:add_on_v4 => addons[:add_on_v4],
-                                        :add_on_v5 => addons[:add_on_v5])
+                                        :add_on_v5 => addons[:add_on_v5],
+                                        :add_on_v6 => addons[:add_on_v6])
       end
     end
 
     class AddOnsArray < Hashie::Trash
       property :AddOnV4,     :from => :add_on_v4
       property :AddOnV5,     :from => :add_on_v5
+      property :AddOnV6,     :from => :add_on_v6
 
       def add_on_v4=(vals)
         return unless vals
@@ -101,6 +103,11 @@ def add_on_v5=(vals)
         return unless vals
         self[:AddOnV5] = vals.map{ |value| AddOn.new(value).to_hash }
       end
+
+      def add_on_v6=(vals)
+        return unless vals
+        self[:AddOnV6] = vals.map{ |value| AddOn.new(value).to_hash }
+      end
     end
 
     class AddOn < Hashie::Trash
diff --git a/test/mapping_test.rb b/test/mapping_test.rb
index 65c8180..5b92820 100644
--- a/test/mapping_test.rb
+++ b/test/mapping_test.rb
@@ -63,6 +63,17 @@ class MappingTest < Test::Unit::TestCase
           assert_equal @rate.to_hash['AddOns'], { "AddOnV5" => @expected }
         end
       end
+
+      context 'a rate with add_on_v6 add-ons' do
+        setup do
+          @params[:add_ons] = { add_on_v6: @add_ons}
+          @rate = Stamps::Mapping::Rate.new(@params)
+        end
+
+        should 'map add_ons to AddOnsV6' do
+          assert_equal @rate.to_hash['AddOns'], { "AddOnV6" => @expected }
+        end
+      end
     end
   end