diff --git a/Gemfile.lock b/Gemfile.lock
index 1efc2fe..243bd0a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -26,7 +26,7 @@ GEM
     pygments.rb (0.3.2)
       posix-spawn (~> 0.3.6)
       yajl-ruby (~> 1.1.0)
-    rack (1.4.1)
+    rack (1.6.13)
     rack-protection (1.2.0)
       rack
     sanitize (2.0.3)