diff --git a/docs/deployment/application-deployment.md b/docs/deployment/application-deployment.md
index 07ce908255e..3e2a5567eb5 100644
--- a/docs/deployment/application-deployment.md
+++ b/docs/deployment/application-deployment.md
@@ -125,8 +125,8 @@ As an alternative, the Dokku project offers an optional letsencrypt plugin that
 # plugin installation requires root, hence the user change
 sudo dokku plugin:install https://github.com/dokku/dokku-letsencrypt.git
 
-# configure the plugin
-dokku config:set --global DOKKU_LETSENCRYPT_EMAIL=your-email@your.domain.com
+# set global email for letsencrypt
+dokku letsencrypt:set --global email your-email@your.domain.com
 
 # set a custom domain that you own for your application
 dokku domains:set ruby-getting-started ruby-getting-started.your.domain.com