diff --git a/docs/content/howto/monitoring-with-prometheus-and-grafana/index.md b/docs/content/howto/monitoring-with-prometheus-and-grafana/index.md
index 4588e0e..296cbab 100644
--- a/docs/content/howto/monitoring-with-prometheus-and-grafana/index.md
+++ b/docs/content/howto/monitoring-with-prometheus-and-grafana/index.md
@@ -24,7 +24,7 @@ This will expose the following metrics on `http://127.0.0.1:42042/metrics`:
 iocaine_requests_total 1
 
 # TYPE process_start_time_seconds gauge
-process_start_time_seconds{instance="127.0.0.1:42042",service="iocaine"} 1738873005.2406795
+process_start_time_seconds{service="iocaine"} 1738873005.2406795
 ```
 
 The `process_start_time_seconds` metric is *always* present, and its value only changes when `iocaine` is restarted. For the sake of brevity, it is excluded from all other examples.
diff --git a/src/app.rs b/src/app.rs
index 4a305ed..137de28 100644
--- a/src/app.rs
+++ b/src/app.rs
@@ -162,16 +162,13 @@ impl Iocaine {
 
     #[cfg(feature = "prometheus")]
     async fn start_metrics_server(metrics_bind: String) -> std::result::Result<(), std::io::Error> {
-        let metrics_listener = tokio::net::TcpListener::bind(metrics_bind.clone()).await?;
+        let metrics_listener = tokio::net::TcpListener::bind(metrics_bind).await?;
         let app = Self::metrics_app().await;
 
         let ts = SystemTime::now()
             .duration_since(UNIX_EPOCH)
             .expect("Time went backwards");
-        let labels = [
-            ("instance", metrics_bind),
-            ("service", "iocaine".to_string()),
-        ];
+        let labels = [("service", "iocaine".to_string())];
         metrics::gauge!("process_start_time_seconds", &labels).set(ts);
 
         axum::serve(metrics_listener, app)