diff --git a/zh_tw/documentation/index.md b/zh_tw/documentation/index.md
index 8a4ec1553b..26adcf9610 100644
--- a/zh_tw/documentation/index.md
+++ b/zh_tw/documentation/index.md
@@ -108,7 +108,7 @@ lang: zh_tw
 [7]: http://www.techotopia.com/index.php/Ruby_Essentials
 [8]: http://pine.fm/LearnToProgram/
 [9]: http://www.ruby-doc.org/docs/ProgrammingRuby/
-[10]: http://pragmaticprogrammer.com/titles/ruby/index.html
+[10]: https://pragprog.com/titles/ruby5/programming-ruby-3-3-5th-edition/
 [12]: http://en.wikibooks.org/wiki/Ruby_programming_language
 [13]: http://www.ruby-doc.org/core
 [14]: https://ruby.github.io/rdoc/