diff --git a/20141120/vagrant_and_chef/demo/Gemfile.lock b/20141120/vagrant_and_chef/demo/Gemfile.lock
index 59767f3..df75dde 100644
--- a/20141120/vagrant_and_chef/demo/Gemfile.lock
+++ b/20141120/vagrant_and_chef/demo/Gemfile.lock
@@ -95,7 +95,7 @@ GEM
     mixlib-cli (1.5.0)
     mixlib-config (2.1.0)
     mixlib-log (1.6.0)
-    mixlib-shellout (1.6.0)
+    mixlib-shellout (1.6.1)
     multipart-post (2.0.0)
     net-http-persistent (2.9.4)
     net-ssh (2.9.1)
@@ -123,7 +123,7 @@ GEM
       coderay (~> 1.1.0)
       method_source (~> 0.8.1)
       slop (~> 3.4)
-    rack (1.5.2)
+    rack (2.0.7)
     rest-client (1.6.7)
       mime-types (>= 1.16)
     retryable (1.3.6)