diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index e54befb6f147..762af21d5d61 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -112,3 +112,4 @@ You can run the tests using:
 bundle install
 bundle exec rubocop
 ```
+https://eruda.liriliri.io/