diff --git a/README.md b/README.md
index 43269d83..4b88be4c 100644
--- a/README.md
+++ b/README.md
@@ -115,6 +115,9 @@ To integrate with an LMS (e.g. Moodle), have a look at [LTI](LTI/LTI.md).
 
 * You need an additional [TURN](https://github.com/coturn/coturn)-server for clients located behind restrictive firewalls! Add your server and credentials to `app/config.js`
 
+## Prometheus monitoring
+To enable the exporter, have a look at [prom](prom.md).
+
 ## Community-driven support
 
 * Open mailing list: community@lists.edumeet.org
diff --git a/prom.md b/prom.md
index 51ba2e8d..30f06292 100644
--- a/prom.md
+++ b/prom.md
@@ -46,7 +46,7 @@ on the allocated port (see `/etc/ferm/ferm.conf`).
 |           |      |                    |             |          |
 | mediasoup |      | express  socket.io |     net     | express  |
 +-----+-----+      +----+---------+-----+-----+-------+-----+----+
-      ^ min-max         ^ 443     ^ 443       ^ sock        ^ PROM_PORT
+      ^ min-max         ^ 443     ^ 443       ^ sock        ^ 8889
       | RTP             | HTTPS   | ws        |             | HTTP
       |                 |         |           |             |
       |               +-+---------+-+  +------+------+  +---+--------+
diff --git a/server/config/config.example.js b/server/config/config.example.js
index 791c120d..affafbe8 100644
--- a/server/config/config.example.js
+++ b/server/config/config.example.js
@@ -396,6 +396,7 @@ module.exports =
 	/*
 	prometheus: {
 		deidentify: false, // deidentify IP addresses
+		// listen: 'localhost', // exporter listens on this address
 		numeric: false, // show numeric IP addresses
 		port: 8889, // allocated port
 		quiet: false // include fewer labels
diff --git a/server/lib/promExporter.js b/server/lib/promExporter.js
index 0bcb4bb8..82bb7a13 100644
--- a/server/lib/promExporter.js
+++ b/server/lib/promExporter.js
@@ -242,6 +242,7 @@ module.exports = async function(rooms, peers, config)
 	try
 	{
 		logger.debug(`config.deidentify=${config.deidentify}`);
+		logger.debug(`config.listen=${config.listen}`);
 		logger.debug(`config.numeric=${config.numeric}`);
 		logger.debug(`config.port=${config.port}`);
 		logger.debug(`config.quiet=${config.quiet}`);
@@ -270,12 +271,13 @@ module.exports = async function(rooms, peers, config)
 
 			res.end(data);
 		});
-		const server = app.listen(config.port || 8889, () =>
-		{
-			const address = server.address();
+		const server = app.listen(config.port || 8889,
+			config.listen || undefined, () =>
+			{
+				const address = server.address();
 
-			logger.info(`listening ${address.address}:${address.port}`);
-		});
+				logger.info(`listening ${address.address}:${address.port}`);
+			});
 	}
 	catch (err)
 	{