From 4af7cc648434b415f8c546cf106cbf45d0ced327 Mon Sep 17 00:00:00 2001
From: Hiroshi SHIBATA <hsbt@ruby-lang.org>
Date: Fri, 6 Mar 2020 11:22:47 +0900
Subject: [PATCH] For Ruby 2.3

---
 spec/support/rubygems_ext.rb | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/spec/support/rubygems_ext.rb b/spec/support/rubygems_ext.rb
index 3c8d97b83ce..62e2274fbe4 100644
--- a/spec/support/rubygems_ext.rb
+++ b/spec/support/rubygems_ext.rb
@@ -23,7 +23,8 @@ module Rubygems
       "rake" => "13.0.1",
       "builder" => "~> 3.2",
       # ruby-graphviz is used by the viz tests
-      "ruby-graphviz" => ">= 0.a",
+      # for >= Ruby 2.3
+      "ruby-graphviz" => "1.2.4",
     }
 
     extend self