diff --git a/dev-ruby/hashdiff/hashdiff-1.2.1.ebuild b/dev-ruby/hashdiff/hashdiff-1.2.1.ebuild
index 78694926afd6..2e82b1bbedc5 100644
--- a/dev-ruby/hashdiff/hashdiff-1.2.1.ebuild
+++ b/dev-ruby/hashdiff/hashdiff-1.2.1.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"
 
 RUBY_FAKEGEM_RECIPE_TEST="rspec3"