diff --git a/Gemfile.lock b/Gemfile.lock
index 9efda2a..a377a58 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -107,7 +107,7 @@ GEM
       tilt (~> 1.4.1)
     padrino-support (0.12.2)
       activesupport (>= 3.1)
-    rack (1.5.2)
+    rack (1.6.12)
     rack-test (0.6.2)
       rack (>= 1.0)
     rake (10.3.2)