diff --git a/Gemfile.lock b/Gemfile.lock
index b124c98..5327639 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -106,7 +106,7 @@ GEM
     padrino-support (0.12.3)
       activesupport (>= 3.1)
     ptools (1.2.6)
-    rack (1.5.2)
+    rack (1.6.13)
     rack-livereload (0.3.15)
       rack
     rack-test (0.6.2)