diff --git a/Gemfile.lock b/Gemfile.lock
index d5c963e..1a96373 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -95,7 +95,7 @@ GEM
       tilt (~> 1.4.1)
     padrino-support (0.13.0)
       activesupport (>= 3.1)
-    rack (1.6.4)
+    rack (1.6.13)
     rack-livereload (0.3.16)
       rack
     rack-test (0.6.3)