diff --git a/Gemfile.lock b/Gemfile.lock
index 5134057..b9a8531 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -61,7 +61,7 @@ GEM
       coderay (~> 1.0.5)
       method_source (~> 0.8)
       slop (~> 3.4)
-    rack (1.5.2)
+    rack (1.6.13)
     rake (10.1.0)
     rb-fsevent (0.9.3)
     rb-inotify (0.9.0)