diff --git a/Gemfile.lock b/Gemfile.lock
index 21ebab5..38564a5 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -89,7 +89,7 @@ GEM
     pygments.rb (0.5.4)
       posix-spawn (~> 0.3.6)
       yajl-ruby (~> 1.1.0)
-    rack (1.5.2)
+    rack (2.0.7)
     rack-contrib (1.1.0)
       rack (>= 0.9.1)
     rake (10.3.1)