diff --git a/Gemfile.lock b/Gemfile.lock
index 1bf4f89..a0d9167 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -95,7 +95,7 @@ GEM
       tilt (~> 1.4.1)
     padrino-support (0.13.1)
       activesupport (>= 3.1)
-    rack (1.6.4)
+    rack (1.6.12)
     rack-test (0.6.3)
       rack (>= 1.0)
     rake (10.4.2)