diff --git a/Gemfile.lock b/Gemfile.lock
index a2a8b49..e3b8b5b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -124,7 +124,7 @@ GEM
     padrino-support (0.13.2)
       activesupport (>= 3.1)
     parallel (1.9.0)
-    rack (1.6.4)
+    rack (1.6.13)
     rack-livereload (0.3.16)
       rack
     rails-assets-tether (1.1.1)