diff --git a/README.md b/README.md
index 09e9b80f..6e60b1b2 100644
--- a/README.md
+++ b/README.md
@@ -328,6 +328,7 @@ dataSourceClassName=org.postgresql.ds.PGSimpleDataSource
 dataSource.user=test
 dataSource.password=test
 dataSource.databaseName=mydb
+dataSource.portNumber=5432
 dataSource.serverName=localhost
 ```
 or ``java.util.Properties`` based: