diff --git a/Gemfile.lock b/Gemfile.lock
index 19d78ba..822078a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -71,7 +71,7 @@ GEM
       net-ssh (>= 2.6.5)
     net-ssh (2.7.0)
     ptools (1.2.2)
-    rack (1.5.2)
+    rack (1.6.13)
     rack-livereload (0.3.15)
       rack
     rack-test (0.6.2)