diff --git a/README.md b/README.md
index 0099c049..e42e1706 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,7 @@ This package is available for Docker:
 # Start an example database
 docker run --net=host -it --rm -e POSTGRES_PASSWORD=password postgres
 # Connect to it
-docker run -e DATA_SOURCE_NAME="postgresql://postgres:password@localhost:5432/?sslmode=disable" -p 9187:9187 wrouesnel/postgres_exporter
+docker run --net=host -e DATA_SOURCE_NAME="postgresql://postgres:password@localhost:5432/?sslmode=disable" wrouesnel/postgres_exporter
 ```
 
 ## Building and running