diff --git a/Gemfile.lock b/Gemfile.lock
index d9544ee..d126d82 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -86,7 +86,7 @@ GEM
     pygments.rb (0.5.0)
       posix-spawn (~> 0.3.6)
       yajl-ruby (~> 1.1.0)
-    rack (1.4.1)
+    rack (1.4.7)
     rack-contrib (1.1.0)
       rack (>= 0.9.1)
     rack-livereload (0.3.13)