diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 1b5a50d4a..4b9d440c0 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -13,7 +13,9 @@ You can create an issue [here](https://github.com/vimeo/psalm/issues/new), but b
 
 ## Pull Requests
 
+[Here’s a guide to the codebase you may find useful](docs/how_psalm_works.md).
+
 Before you send a pull request, make sure you follow these guidelines:
 
-* Make sure to run `composer tests` and `./psalm --find-dead-code` to ensure that Travis builds will pass
+* Make sure to run `composer tests` and `./psalm` to ensure that Travis builds will pass
 * Don’t forget to add tests!