diff --git a/pelorus-operator/helm-charts/pelorus/templates/grafana-thanos-datasource.yaml b/pelorus-operator/helm-charts/pelorus/templates/grafana-thanos-datasource.yaml
index 0b077d75..488ae32f 100644
--- a/pelorus-operator/helm-charts/pelorus/templates/grafana-thanos-datasource.yaml
+++ b/pelorus-operator/helm-charts/pelorus/templates/grafana-thanos-datasource.yaml
@@ -5,6 +5,9 @@ metadata:
   name: prometheus-grafana-datasource
 spec:
   name: prometheus.yaml
+  instanceSelector:
+    matchLabels:
+      grafana: grafana-oauth
   datasource:
     access: "proxy"
     basicAuth: true