diff --git a/README.rdoc b/README.rdoc
index e89e868ddfffc7d94c2c802f97875183ea8a23e8..881e30bf4fe6a85676fb137f3dc5399262a9f49d 100644
--- a/README.rdoc
+++ b/README.rdoc
@@ -33,6 +33,7 @@ Just run the application with the following command.
 
 == Using Docker
 
+    UID=$(UID) GID=$(GID) docker-compose run --rm -- aethyr bundle install --path vendor/bundle
     UID=${UID} GID=${GID} docker-compose run --rm -- aethyr bundle exec ./bin/aethyr_setup
     UID=${UID} GID=${GID} docker-compose up