diff --git a/README.md b/README.md
index 9386598..5fb7f39 100644
--- a/README.md
+++ b/README.md
@@ -36,6 +36,17 @@ $ docker run --name some-pgrouting \
   -d starefossen/pgrouting
 ```
 
+If you want to start this same basic container, but be able to connect to it externally, start it as follows:
+
+```bash
+$ docker run --name some-pgrouting \
+  -e POSTGRES_PASSWORD=mysecretpassword \
+  -p 5433:5432
+  -d starefossen/pgrouting
+```
+
+The container will then be reachable at port 5433 from your local system.
+
 For more detailed instructions about how to start and control your Postgres
 container, see the documentation for the `postgres` image
 [here](https://registry.hub.docker.com/_/postgres/).