diff --git a/config.ru b/config.ru
index 6b78c9f..bbe21aa 100644
--- a/config.ru
+++ b/config.ru
@@ -5,6 +5,8 @@ require 'securerandom'
 Geminabox.data = '/srv/gems'
 Geminabox.rubygems_proxy = true
 Geminabox.allow_remote_failure = true
+Geminabox.build_legacy = false
+Geminabox.rubygems_proxy_merge_strategy = :combine_local_and_remote_gem_versions
 
 # https://github.com/geminabox/geminabox/wiki/Http-Basic-Auth
 Geminabox::Server.helpers do