diff --git a/README.rst b/README.rst
index b226f95..e3a373b 100644
--- a/README.rst
+++ b/README.rst
@@ -59,7 +59,7 @@ This Makefile-based workflow lets you choose between installing ``make_post_sell
 
          # the root domain acts as a SaaS for many shop domains!
          export MAKE_POST_SELL_ROOT_DOMAIN="example.com"
-         export MAKE_POST_SELL_ROOT_URL="http://example.com:6502"
+         export MAKE_POST_SELL_ROOT_URL="http://example.com:6501"
 
    With the virtual environment active, start the server::