diff --git a/manifests/prometheus/0.22.2/alertmanager.crd.yaml b/manifests/prometheus/0.22.2/alertmanager.crd.yaml
index ce56f4bb6..291b3b36c 100644
--- a/manifests/prometheus/0.22.2/alertmanager.crd.yaml
+++ b/manifests/prometheus/0.22.2/alertmanager.crd.yaml
@@ -3,6 +3,7 @@ kind: CustomResourceDefinition
 metadata:
   name: alertmanagers.monitoring.coreos.com
 spec:
+  preserveUnknownFields: false
   group: monitoring.coreos.com
   names:
     kind: Alertmanager
diff --git a/manifests/prometheus/0.22.2/prometheus.crd.yaml b/manifests/prometheus/0.22.2/prometheus.crd.yaml
index 1a02408aa..1ad279a87 100644
--- a/manifests/prometheus/0.22.2/prometheus.crd.yaml
+++ b/manifests/prometheus/0.22.2/prometheus.crd.yaml
@@ -3,6 +3,7 @@ kind: CustomResourceDefinition
 metadata:
   name: prometheuses.monitoring.coreos.com
 spec:
+  preserveUnknownFields: false
   group: monitoring.coreos.com
   names:
     kind: Prometheus
diff --git a/manifests/prometheus/0.22.2/prometheusrule.crd.yaml b/manifests/prometheus/0.22.2/prometheusrule.crd.yaml
index 7ced5a680..8c643a88d 100644
--- a/manifests/prometheus/0.22.2/prometheusrule.crd.yaml
+++ b/manifests/prometheus/0.22.2/prometheusrule.crd.yaml
@@ -3,6 +3,7 @@ kind: CustomResourceDefinition
 metadata:
   name: prometheusrules.monitoring.coreos.com
 spec:
+  preserveUnknownFields: false
   group: monitoring.coreos.com
   names:
     kind: PrometheusRule
diff --git a/manifests/prometheus/0.22.2/servicemonitor.crd.yaml b/manifests/prometheus/0.22.2/servicemonitor.crd.yaml
index 029639684..958ad1421 100644
--- a/manifests/prometheus/0.22.2/servicemonitor.crd.yaml
+++ b/manifests/prometheus/0.22.2/servicemonitor.crd.yaml
@@ -3,6 +3,7 @@ kind: CustomResourceDefinition
 metadata:
   name: servicemonitors.monitoring.coreos.com
 spec:
+  preserveUnknownFields: false
   group: monitoring.coreos.com
   names:
     kind: ServiceMonitor