diff --git a/Gemfile.lock b/Gemfile.lock
index 84019f4e22..e8515e0500 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -50,7 +50,7 @@ GEM
       coderay (~> 1.1.0)
       method_source (~> 0.8.1)
       slop (~> 3.4)
-    rack (1.5.2)
+    rack (1.6.13)
     rake (0.9.6)
     rb-fsevent (0.9.4)
     rb-inotify (0.9.5)