diff --git a/Gemfile.lock b/Gemfile.lock
index e514ab2..d6a26f4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -30,7 +30,7 @@ GEM
     mysql2 (0.3.11)
     open4 (1.3.0)
     pg (0.14.1)
-    rack (1.4.1)
+    rack (1.6.13)
     rack-protection (1.3.2)
       rack
     rack-test (0.6.2)