diff --git a/Gemfile b/Gemfile
index 2d7d5aa87..2ad15ad16 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,5 +1,5 @@
 source 'http://rubygems.org'
 
-gem 'sinatra', '1.2.6'
-gem 'thin', '1.2.7'
-gem 'maruku', '0.6.0'
+gem 'sinatra', '1.4.4'
+gem 'thin', '1.6.1'
+gem 'maruku', '0.7.1'
diff --git a/Gemfile.lock b/Gemfile.lock
index 5a934fa1d..de057fa4c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,25 +1,26 @@
 GEM
   remote: http://rubygems.org/
   specs:
-    daemons (1.1.3)
-    eventmachine (0.12.10)
-    maruku (0.6.0)
-      syntax (>= 1.0.0)
-    rack (1.3.0)
-    sinatra (1.2.6)
-      rack (~> 1.1)
-      tilt (>= 1.2.2, < 2.0)
-    syntax (1.0.0)
-    thin (1.2.7)
+    daemons (1.1.9)
+    eventmachine (1.0.3)
+    maruku (0.7.1)
+    rack (1.5.2)
+    rack-protection (1.5.2)
+      rack
+    sinatra (1.4.4)
+      rack (~> 1.4)
+      rack-protection (~> 1.4)
+      tilt (~> 1.3, >= 1.3.4)
+    thin (1.6.1)
       daemons (>= 1.0.9)
-      eventmachine (>= 0.12.6)
+      eventmachine (>= 1.0.0)
       rack (>= 1.0.0)
-    tilt (1.3.2)
+    tilt (1.4.1)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
-  maruku (= 0.6.0)
-  sinatra (= 1.2.6)
-  thin (= 1.2.7)
+  maruku (= 0.7.1)
+  sinatra (= 1.4.4)
+  thin (= 1.6.1)
diff --git a/public/12factor.mobi b/public/12factor.mobi
new file mode 100644
index 000000000..14a3eb80a
Binary files /dev/null and b/public/12factor.mobi differ
diff --git a/views/home.erb b/views/home.erb
index 6a81c3d47..ce7cf2c46 100644
--- a/views/home.erb
+++ b/views/home.erb
@@ -13,4 +13,5 @@
   <span>Last updated Jan 30, 2012</span>
   <span><a href="http://github.com/adamwiggins/12factor">Sourcecode</a></span>
   <span><a href="/12factor.epub">Download ePub Book</a></span>
+  <span><a href="/12factor.mobi">Download Kindle Book</a></span>
 </footer>