diff --git a/manifests/prometheus-prometheus.yaml b/manifests/prometheus-prometheus.yaml
index e45a86f8..b466b670 100644
--- a/manifests/prometheus-prometheus.yaml
+++ b/manifests/prometheus-prometheus.yaml
@@ -34,6 +34,7 @@ spec:
   resources:
     requests:
       memory: 400Mi
+  ruleNamespaceSelector: {}
   ruleSelector:
     matchLabels:
       prometheus: k8s