diff --git a/dev-ruby/certificate_authority/certificate_authority-0.1.6-r2.ebuild b/dev-ruby/certificate_authority/certificate_authority-0.1.6-r2.ebuild
index 0e63ad3ac9a0b..b7f8c502f8592 100644
--- a/dev-ruby/certificate_authority/certificate_authority-0.1.6-r2.ebuild
+++ b/dev-ruby/certificate_authority/certificate_authority-0.1.6-r2.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="ruby23 ruby24 ruby25"
 
 RUBY_FAKEGEM_RECIPE_TEST="rspec"