diff --git a/README.md b/README.md
index c17c2bf..4406e45 100644
--- a/README.md
+++ b/README.md
@@ -15,7 +15,7 @@ ln -s config.py.example config.py
 mkdir /var/tmp/prolefeeder-test-data
 mkdir /var/tmp/prolefeeder-test-out
 python generate-test-data.py
-python prolefeeder.py
+FLASK_ENV=development flask run --host=127.0.0.1
 ~~~
 
 and then open http://127.0.0.1:5000/ in your browser.