diff --git a/dev-ruby/open4/open4-1.3.4.ebuild b/dev-ruby/open4/open4-1.3.4.ebuild
index 304ad1d76f136..2bba042582867 100644
--- a/dev-ruby/open4/open4-1.3.4.ebuild
+++ b/dev-ruby/open4/open4-1.3.4.ebuild
@@ -2,7 +2,7 @@
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=5
-USE_RUBY="ruby21 ruby22 ruby23 ruby24"
+USE_RUBY="ruby22 ruby23 ruby24 ruby25"
 
 RUBY_FAKEGEM_TASK_DOC=""
 RUBY_FAKEGEM_EXTRADOC="README"