diff --git a/dev-ruby/unf/unf-0.1.4.ebuild b/dev-ruby/unf/unf-0.1.4.ebuild
index 8d25a7d3c31eb..0d4fb46745c2e 100644
--- a/dev-ruby/unf/unf-0.1.4.ebuild
+++ b/dev-ruby/unf/unf-0.1.4.ebuild
@@ -3,7 +3,7 @@
 
 EAPI=5
 
-USE_RUBY="ruby21 ruby22 ruby23 ruby24"
+USE_RUBY="ruby23 ruby24 ruby25"
 
 RUBY_FAKEGEM_RECIPE_TEST="none"
 RUBY_FAKEGEM_TASK_DOC=""