diff --git a/Vagrantfile b/Vagrantfile
index 194cf0a..423aef3 100644
--- a/Vagrantfile
+++ b/Vagrantfile
@@ -1,3 +1,5 @@
+require 'date'
+
 Vagrant.configure(2) do |config|
     config.vm.provider :virtualbox do |v|
         v.name = 'exa'