diff --git a/documentdb-local/index.md b/documentdb-local/index.md
index 2eb4475..92a9fc9 100644
--- a/documentdb-local/index.md
+++ b/documentdb-local/index.md
@@ -68,7 +68,7 @@ The following table summarizes the available Docker commands for configuring the
 | Specify the owner. | `--owner [value]` | Overrides `OWNER` environment variable. | STRING | `documentdb` | Specify the owner for DocumentDB. |
 | Specify whether to start the PostgreSQL server. | `--start-pg` | NA | `true`, `false` | `true` | Specify whether to start the PostgreSQL server. |
 | Specify whether to create a user. | `--create-user` | NA | `true`, `false` | `true` | Specify whether to create a user. |
-| Specify the port for the PostgreSQL server. | `--pg-port [value]` | Overrides `PG_PORT` environment variable | INT | `9712` | Specify the port for the PostgreSQL server. |
+| Specify the port for the PostgreSQL server. | `--pg-port [value]` | Overrides `POSTGRESQL_PORT` environment variable | INT | `9712` | Specify the port for the PostgreSQL server. |
 | Specify whether to allow external connections to PostgreSQL. | `--allow-external-connections` | Overrides `ALLOW_EXTERNAL_CONNECTIONS` environment variable | `true`, `false` | `false` | Specify whether to allow external connections to PostgreSQL. |
 | Specify the path to a certificate for securing traffic. | `--cert-path [value]` | Overrides `CERT_PATH` environment variable. | STRING | NA | You need to mount this file into the container. For example, to set `/mycert.pfx`, add this option to `docker run` command: `--mount type=bind,source=./mycert.pfx,target=/mycert.pfx`. Can set `CERT_SECRET` to the password for the certificate. |
 | Override default key with key in key file. | `--key-file [value]` | Overrides `KEY_FILE` environment variable. | STRING | NA | You need to mount this file into the container. For example, to set `/mykey.key`, add this option to `docker run` command: `--mount type=bind,source=./mykey.key,target=/mykey.key` |