diff --git a/postgresql/kustomization.yaml b/postgresql/kustomization.yaml
index 608888f..3c60a33 100644
--- a/postgresql/kustomization.yaml
+++ b/postgresql/kustomization.yaml
@@ -1,6 +1,10 @@
 apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
 
+labels:
+- pairs:
+    app.kubernetes.io/instance: postgresql
+
 namespace: postgresql
 
 resources: