diff --git a/dev-ruby/concurrent-ruby/concurrent-ruby-1.1.8.ebuild b/dev-ruby/concurrent-ruby/concurrent-ruby-1.1.8.ebuild
index 6b34f26821355..4d86946d23202 100644
--- a/dev-ruby/concurrent-ruby/concurrent-ruby-1.1.8.ebuild
+++ b/dev-ruby/concurrent-ruby/concurrent-ruby-1.1.8.ebuild
@@ -2,7 +2,7 @@
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=7
-USE_RUBY="ruby25 ruby26 ruby27"
+USE_RUBY="ruby25 ruby26 ruby27 ruby30"
 
 RUBY_FAKEGEM_RECIPE_TEST="rspec3"