From 5c8102da8bc2bcc8ea5e0d777b0303e6543ecd05 Mon Sep 17 00:00:00 2001
From: ablzh <123565843+ablzh@users.noreply.github.com>
Date: Sun, 4 Jan 2026 09:53:02 +0800
Subject: [PATCH] Fix broken link to "Programming Ruby (first edition)"

---
 en/documentation/index.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/en/documentation/index.md b/en/documentation/index.md
index 6fa18161c3..3d6d3023aa 100644
--- a/en/documentation/index.md
+++ b/en/documentation/index.md
@@ -195,7 +195,7 @@ These links were more prominent but haven't been updated in ages.
 [5]: https://poignant.guide
 [7]: https://www.techotopia.com/index.php/Ruby_Essentials
 [8]: https://pine.fm/LearnToProgram/
-[9]: https://ruby-doc.com/docs/ProgrammingRuby/
+[9]: https://web.archive.org/web/20250512022451/https://ruby-doc.com/docs/ProgrammingRuby/
 [10]: https://pragprog.com/titles/ruby5/programming-ruby-3-3-5th-edition/
 [12]: https://en.wikibooks.org/wiki/Ruby_programming_language
 [16]: https://www.rubydoc.info/