diff --git a/dev-ruby/ref/ref-2.0.0.ebuild b/dev-ruby/ref/ref-2.0.0.ebuild
index 48be55781713c..e98a2397cd02c 100644
--- a/dev-ruby/ref/ref-2.0.0.ebuild
+++ b/dev-ruby/ref/ref-2.0.0.ebuild
@@ -1,8 +1,8 @@
-# Copyright 1999-2016 Gentoo Foundation
+# Copyright 1999-2017 Gentoo Foundation
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=5
-USE_RUBY="ruby20 ruby21 ruby22 ruby23"
+USE_RUBY="ruby21 ruby22 ruby23 ruby24"
 
 RUBY_FAKEGEM_RECIPE_TEST="rspec3"