diff --git a/manifests/grafana.yaml b/manifests/grafana.yaml
index ef67740..cd69e85 100644
--- a/manifests/grafana.yaml
+++ b/manifests/grafana.yaml
@@ -65,10 +65,9 @@ spec:
               options:
                 path: /var/lib/grafana/dashboards/prometheus
 
-        # Use existing admin credentials from database, don't create new ones
-        env:
-          GF_SECURITY_ADMIN_USER: ""
-          GF_SECURITY_ADMIN_PASSWORD: ""
+        # Disable admin user provisioning to use existing database users
+        admin:
+          existingSecret: ""
   destination:
     server: https://kubernetes.default.svc
     namespace: default