diff --git a/README.md b/README.md
index 22e2281..f77d8d8 100644
--- a/README.md
+++ b/README.md
@@ -74,6 +74,7 @@ Instead of `matthuntington` insert your computer's username (what you found when
 
 1. run `heroku create` (take note of the app name for later)
 1. run `heroku config:set LOG_CHANNEL=errorlog`
+1. run `heroku config:set APP_KEY=$(php artisan --no-ansi key:generate --show)`
 
 ### in your browser