diff --git a/Gemfile.lock b/Gemfile.lock
index 3739ee5..1f45536 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -42,7 +42,7 @@ GEM
       rb-fsevent (~> 0.9.1)
       rb-inotify (~> 0.8.8)
     multi_json (1.3.6)
-    rack (1.5.2)
+    rack (1.6.12)
     rake (10.0.4)
     rb-fchange (0.0.5)
       ffi