diff --git a/Gemfile.lock b/Gemfile.lock
index d7a7c88..dd96702 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -136,7 +136,7 @@ GEM
     pygments.rb (0.6.0)
       posix-spawn (~> 0.3.6)
       yajl-ruby (~> 1.1.0)
-    rack (1.5.2)
+    rack (1.6.13)
     rb-fsevent (0.9.4)
     rb-inotify (0.9.5)
       ffi (>= 0.5.0)