diff --git a/linkerd.io/content/2.13/tasks/external-prometheus.md b/linkerd.io/content/2.13/tasks/external-prometheus.md
index 0703bc166b..15f601e4d8 100644
--- a/linkerd.io/content/2.13/tasks/external-prometheus.md
+++ b/linkerd.io/content/2.13/tasks/external-prometheus.md
@@ -141,6 +141,8 @@ on the Prometheus instance to power the dashboard and CLI.
 The `prometheusUrl` field gives you a single place through
 which all these components can be configured to an external Prometheus URL.
 This is allowed both through the CLI and Helm.
+If the external Prometheus is secured with basic auth,
+you can include the credentials in the URL as well.
 
 ### CLI
 
@@ -148,7 +150,14 @@ This can be done by passing a file with the above field to the `values` flag,
 which is available through `linkerd viz install` command.
 
 ```yaml
-prometheusUrl: existing-prometheus.xyz:9090
+prometheusUrl: http://existing-prometheus.namespace:9090
+```
+
+If the external Prometheus is secured with basic auth, you can include the
+credentials in the URL as well.
+
+```yaml
+prometheusUrl: http://username:password@existing-prometheus.namespace:9090
 ```
 
 Once applied, this configuration is not persistent across installs.
diff --git a/linkerd.io/content/2.14/tasks/external-prometheus.md b/linkerd.io/content/2.14/tasks/external-prometheus.md
index 0703bc166b..15f601e4d8 100644
--- a/linkerd.io/content/2.14/tasks/external-prometheus.md
+++ b/linkerd.io/content/2.14/tasks/external-prometheus.md
@@ -141,6 +141,8 @@ on the Prometheus instance to power the dashboard and CLI.
 The `prometheusUrl` field gives you a single place through
 which all these components can be configured to an external Prometheus URL.
 This is allowed both through the CLI and Helm.
+If the external Prometheus is secured with basic auth,
+you can include the credentials in the URL as well.
 
 ### CLI
 
@@ -148,7 +150,14 @@ This can be done by passing a file with the above field to the `values` flag,
 which is available through `linkerd viz install` command.
 
 ```yaml
-prometheusUrl: existing-prometheus.xyz:9090
+prometheusUrl: http://existing-prometheus.namespace:9090
+```
+
+If the external Prometheus is secured with basic auth, you can include the
+credentials in the URL as well.
+
+```yaml
+prometheusUrl: http://username:password@existing-prometheus.namespace:9090
 ```
 
 Once applied, this configuration is not persistent across installs.