diff --git a/dev-ruby/lumberjack/lumberjack-1.4.2.ebuild b/dev-ruby/lumberjack/lumberjack-1.4.2.ebuild
index cfda2644e00ec..64cbd16adf3e6 100644
--- a/dev-ruby/lumberjack/lumberjack-1.4.2.ebuild
+++ b/dev-ruby/lumberjack/lumberjack-1.4.2.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"
 RUBY_FAKEGEM_EXTRADOC="README.md"
diff --git a/dev-ruby/lumberjack/lumberjack-2.0.4.ebuild b/dev-ruby/lumberjack/lumberjack-2.0.4.ebuild
index b62fdcb9bc335..cdbf1997c67c8 100644
--- a/dev-ruby/lumberjack/lumberjack-2.0.4.ebuild
+++ b/dev-ruby/lumberjack/lumberjack-2.0.4.ebuild
@@ -3,7 +3,7 @@
 
 EAPI=8
 
-USE_RUBY="ruby32 ruby33 ruby34"
+USE_RUBY="ruby32 ruby33 ruby34 ruby40"
 
 RUBY_FAKEGEM_RECIPE_TEST="rspec3"
 RUBY_FAKEGEM_EXTRADOC="README.md"