diff --git a/docs/content/advanced/config/optional-config.md b/docs/content/advanced/config/optional-config.md
index c58f5636..636ceb8c 100644
--- a/docs/content/advanced/config/optional-config.md
+++ b/docs/content/advanced/config/optional-config.md
@@ -4,12 +4,13 @@ title: Optional Configuration
 
 You can set these environment variables to configure the container. They are not required, but can be useful in some cases.
 
-| Env            | Default   | Example     | Description                        |
-| -------------- | --------- | ----------- | ---------------------------------- |
-| `PORT`         | `51821`   | `6789`      | TCP port for Web UI.               |
-| `HOST`         | `0.0.0.0` | `localhost` | IP address web UI binds to.        |
-| `INSECURE`     | `false`   | `true`      | If access over http is allowed     |
-| `DISABLE_IPV6` | `false`   | `true`      | If IPv6 support should be disabled |
+| Env            | Default   | Example     | Description                                                                                                                 |
+| -------------- | --------- | ----------- | --------------------------------------------------------------------------------------------------------------------------- |
+| `PORT`         | `51821`   | `6789`      | TCP port for Web UI.                                                                                                        |
+| `HOST`         | `0.0.0.0` | `localhost` | IP address web UI binds to.                                                                                                 |
+| `INSECURE`     | `false`   | `true`      | If access over http is allowed                                                                                              |
+| `DISABLE_IPV6` | `false`   | `true`      | If IPv6 support should be disabled                                                                                          |
+| `WG_INTERFACE` | `wg0`     | `wg1`       | WireGuard interface name. Change when running multiple instances on the same host (e.g. `hostNetwork: true` in Kubernetes). |
 
 /// note | IPv6 Caveats