diff --git a/guides/bug_report_templates/action_controller_gem.rb b/guides/bug_report_templates/action_controller_gem.rb
index 2d02c372472b2..23960a53e72d5 100644
--- a/guides/bug_report_templates/action_controller_gem.rb
+++ b/guides/bug_report_templates/action_controller_gem.rb
@@ -9,6 +9,7 @@
 
   # Activate the gem you are reporting the issue against.
   gem "rails", "~> 7.1.0"
+  gem "psych"
 end
 
 require "rack/test"