From 47c4d2ab344c2ec47079a302a3e0dbb549202775 Mon Sep 17 00:00:00 2001
From: Hiroshi SHIBATA <hsbt@ruby-lang.org>
Date: Thu, 29 Jan 2026 16:13:25 +0900
Subject: [PATCH] rbs need to tsort with Ruby 4.0

---
 Gemfile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Gemfile b/Gemfile
index 7cf3dc9..4113bca 100644
--- a/Gemfile
+++ b/Gemfile
@@ -11,5 +11,6 @@ group :development do
   # RBS requires Ruby >= 3.0
   if RUBY_VERSION >= "3.0.0"
     gem "rbs", "~> 3.4.0"
+    gem "tsort" if RUBY_VERSION >= "4.0"
   end
 end