diff --git a/_gemfiles/Gemfile b/_gemfiles/Gemfile
index d24261f4f..374710674 100644
--- a/_gemfiles/Gemfile
+++ b/_gemfiles/Gemfile
@@ -1,7 +1,7 @@
 source "http://rubygems.org"
 
 gem 'jekyll', '1.3.0'
-gem 'rack', '~> 1.1'
+gem 'rack', '~> 1.6'
 gem 'rack-jekyll', '~> 0.3'
 gem 'rdiscount', '~> 1.6'
 gem "iconv", "~> 1.0.3"
diff --git a/_gemfiles/Gemfile.lock b/_gemfiles/Gemfile.lock
index 83ded57e1..c001f0f42 100644
--- a/_gemfiles/Gemfile.lock
+++ b/_gemfiles/Gemfile.lock
@@ -31,7 +31,7 @@ GEM
     pygments.rb (0.5.4)
       posix-spawn (~> 0.3.6)
       yajl-ruby (~> 1.1.0)
-    rack (1.6.8)
+    rack (1.6.13)
     rack-jekyll (0.5.0)
       jekyll (>= 1.3)
       listen (>= 1.3)
@@ -53,6 +53,6 @@ PLATFORMS
 DEPENDENCIES
   iconv (~> 1.0.3)
   jekyll (= 1.3.0)
-  rack (~> 1.1)
+  rack (~> 1.6)
   rack-jekyll (~> 0.3)
   rdiscount (~> 1.6)