diff --git a/Gemfile.lock b/Gemfile.lock
index 07b6264..aedbc0e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -2,7 +2,7 @@ GEM
   remote: http://rubygems.org/
   specs:
     haml (3.0.25)
-    rack (1.2.2)
+    rack (1.6.13)
     sinatra (1.2.1)
       rack (~> 1.1)
       tilt (>= 1.2.2, < 2.0)