diff --git a/src/charm.py b/src/charm.py
index 69f11ee1..ccee97eb 100755
--- a/src/charm.py
+++ b/src/charm.py
@@ -210,8 +210,13 @@ def __init__(self, *args):
         self.grafana_source_provider = GrafanaSourceProvider(
             charm=self,
             source_type="prometheus",
-            source_url=self.internal_url,  # https://github.com/canonical/operator/issues/970
-            refresh_event=self.cert_handler.on.cert_changed,
+            source_url=self.external_url,
+            refresh_event=[
+                self.ingress.on.ready_for_unit,
+                self.ingress.on.revoked_for_unit,
+                self.on.update_status,
+                self.cert_handler.on.cert_changed,
+            ],
             extra_fields={"timeInterval": PROMETHEUS_GLOBAL_SCRAPE_INTERVAL},
         )