diff --git a/dev-ruby/rack-protection/rack-protection-4.2.1.ebuild b/dev-ruby/rack-protection/rack-protection-4.2.1.ebuild
index abc82f9a4558b..8e970cb309116 100644
--- a/dev-ruby/rack-protection/rack-protection-4.2.1.ebuild
+++ b/dev-ruby/rack-protection/rack-protection-4.2.1.ebuild
@@ -1,9 +1,9 @@
-# Copyright 1999-2025 Gentoo Authors
+# Copyright 1999-2026 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=8
 
-USE_RUBY="ruby32 ruby33 ruby34"
+USE_RUBY="ruby32 ruby33 ruby34 ruby40"
 
 # There are no specs in the gem and the source cannot be downloaded separately.
 RUBY_FAKEGEM_RECIPE_TEST="none"