diff --git a/dev-ruby/pdf-reader/pdf-reader-1.4.1-r4.ebuild b/dev-ruby/pdf-reader/pdf-reader-1.4.1-r4.ebuild
index 4b5c18e871f51..d249272a10d2b 100644
--- a/dev-ruby/pdf-reader/pdf-reader-1.4.1-r4.ebuild
+++ b/dev-ruby/pdf-reader/pdf-reader-1.4.1-r4.ebuild
@@ -1,11 +1,11 @@
-# Copyright 1999-2021 Gentoo Authors
+# Copyright 1999-2022 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=8
 
 GITHUB_USER=yob
 
-USE_RUBY="ruby26 ruby27 ruby30"
+USE_RUBY="ruby26 ruby27 ruby30 ruby31"
 
 RUBY_FAKEGEM_RECIPE_TEST="rspec3"