diff --git a/Vagrantfile b/Vagrantfile
index 0e5a968..2d3bd18 100644
--- a/Vagrantfile
+++ b/Vagrantfile
@@ -43,7 +43,7 @@ Vagrant.configure(2) do |config|
   end
 
   config.vm.box = ENV['wp_box'] || _conf['wp_box']
-  config.vm.box_version = "<= 20180107"
+  config.vm.box_version = "= 20180107"
   config.ssh.forward_agent = true
 
   config.vm.box_check_update = true