diff --git a/Berksfile b/Berksfile
index 3a15b1b..6838cc4 100644
--- a/Berksfile
+++ b/Berksfile
@@ -1,5 +1,7 @@
 source 'https://supermarket.chef.io'
 
+solver :ruby, :required
+
 %w(common).each do |cookbook|
   if Dir.exist?("../cookbook-openstack-#{cookbook}")
     cookbook "openstack-#{cookbook}", path: "../cookbook-openstack-#{cookbook}"