diff --git a/Gemfile.lock b/Gemfile.lock
index 29d14dd..8277e1d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -26,7 +26,7 @@ GEM
     mustache (0.99.4)
     pygments.rb (0.2.12)
       rubypython (~> 0.5.3)
-    rack (1.6.4)
+    rack (2.0.7)
     rake (0.9.2.2)
     rdiscount (1.6.8)
     rspec (2.10.0)