diff --git a/otc/observability.t09.de/stacks/observability/grafana-operator/manifests/grafana.yaml b/otc/observability.t09.de/stacks/observability/grafana-operator/manifests/grafana.yaml
index 0d90fa2..d87d9da 100644
--- a/otc/observability.t09.de/stacks/observability/grafana-operator/manifests/grafana.yaml
+++ b/otc/observability.t09.de/stacks/observability/grafana-operator/manifests/grafana.yaml
@@ -40,6 +40,8 @@ spec:
         - grafana.observability.t09.de
         secretName: grafana-net-tls
   config:
+    server:
+      root_url: "https://grafana.observability.t09.de"
     auth:
       disable_login: "true"
       disable_login_form: "true"