diff --git a/README.md b/README.md
index efe80d93f..5d77ec6ab 100644
--- a/README.md
+++ b/README.md
@@ -79,7 +79,7 @@ web:
 
     FROM orchardup/rails
     ADD . /code
-    RUN bundle exec rackup
+    CMD: bundle exec rackup
 
 
 ### Communicating between containers