diff --git a/RELEASING_RAILS.md b/RELEASING_RAILS.md
index cd850e6ddf104656533784a427590837f1843b39..e5e3c9f91e539e15c874edf5ce2f647808ec56d2 100644
--- a/RELEASING_RAILS.md
+++ b/RELEASING_RAILS.md
@@ -21,7 +21,7 @@ https://buildkite.com/rails/rails
 
 Sam Ruby keeps a [test suite](https://github.com/rubys/awdwr) that makes
 sure the code samples in his book
-([Agile Web Development with Rails](https://pragprog.com/book/rails51/agile-web-development-with-rails-51))
+([Agile Web Development with Rails](https://pragprog.com/titles/rails6))
 all work. These are valuable system tests
 for Rails. You can check the status of these tests here: