diff --git a/jsonnet/kube-prometheus/kube-prometheus.libsonnet b/jsonnet/kube-prometheus/kube-prometheus.libsonnet
index 92262460..2001cd0d 100644
--- a/jsonnet/kube-prometheus/kube-prometheus.libsonnet
+++ b/jsonnet/kube-prometheus/kube-prometheus.libsonnet
@@ -18,38 +18,7 @@ local configMapList = k3.core.v1.configMapList;
   kubePrometheus+:: {
     namespace: k.core.v1.namespace.new($._config.namespace),
   },
-  prometheusOperator+::
-  {
-    '0alertmanagerCustomResourceDefinition'+: {
-      spec: std.mergePatch(super.spec, {
-        preserveUnknownFields: null,
-      }),
-    },
-    '0prometheusCustomResourceDefinition'+: {
-      spec: std.mergePatch(super.spec, {
-        preserveUnknownFields: null,
-      }),
-    },
-    '0servicemonitorCustomResourceDefinition'+: {
-      spec: std.mergePatch(super.spec, {
-        preserveUnknownFields: null,
-      }),
-    },
-    '0podmonitorCustomResourceDefinition'+: {
-      spec: std.mergePatch(super.spec, {
-        preserveUnknownFields: null,
-      }),
-    },
-    '0prometheusruleCustomResourceDefinition'+: {
-      spec: std.mergePatch(super.spec, {
-        preserveUnknownFields: null,
-      }),
-    },
-    '0thanosrulerCustomResourceDefinition'+: {
-      spec: std.mergePatch(super.spec, {
-        preserveUnknownFields: null,
-      }),
-    },
+  prometheusOperator+:: {
     service+: {
       spec+: {
         ports: [
diff --git a/manifests/setup/prometheus-operator-0alertmanagerCustomResourceDefinition.yaml b/manifests/setup/prometheus-operator-0alertmanagerCustomResourceDefinition.yaml
index e04eddbb..a8c04926 100644
--- a/manifests/setup/prometheus-operator-0alertmanagerCustomResourceDefinition.yaml
+++ b/manifests/setup/prometheus-operator-0alertmanagerCustomResourceDefinition.yaml
@@ -12,6 +12,7 @@ spec:
     listKind: AlertmanagerList
     plural: alertmanagers
     singular: alertmanager
+  preserveUnknownFields: false
   scope: Namespaced
   versions:
   - additionalPrinterColumns:
diff --git a/manifests/setup/prometheus-operator-0podmonitorCustomResourceDefinition.yaml b/manifests/setup/prometheus-operator-0podmonitorCustomResourceDefinition.yaml
index 01bcac01..8b8daa7d 100644
--- a/manifests/setup/prometheus-operator-0podmonitorCustomResourceDefinition.yaml
+++ b/manifests/setup/prometheus-operator-0podmonitorCustomResourceDefinition.yaml
@@ -12,6 +12,7 @@ spec:
     listKind: PodMonitorList
     plural: podmonitors
     singular: podmonitor
+  preserveUnknownFields: false
   scope: Namespaced
   versions:
   - name: v1
diff --git a/manifests/setup/prometheus-operator-0prometheusCustomResourceDefinition.yaml b/manifests/setup/prometheus-operator-0prometheusCustomResourceDefinition.yaml
index d391b6b4..37d4d560 100644
--- a/manifests/setup/prometheus-operator-0prometheusCustomResourceDefinition.yaml
+++ b/manifests/setup/prometheus-operator-0prometheusCustomResourceDefinition.yaml
@@ -12,6 +12,7 @@ spec:
     listKind: PrometheusList
     plural: prometheuses
     singular: prometheus
+  preserveUnknownFields: false
   scope: Namespaced
   versions:
   - additionalPrinterColumns:
diff --git a/manifests/setup/prometheus-operator-0prometheusruleCustomResourceDefinition.yaml b/manifests/setup/prometheus-operator-0prometheusruleCustomResourceDefinition.yaml
index 6c8404f6..5c690605 100644
--- a/manifests/setup/prometheus-operator-0prometheusruleCustomResourceDefinition.yaml
+++ b/manifests/setup/prometheus-operator-0prometheusruleCustomResourceDefinition.yaml
@@ -12,6 +12,7 @@ spec:
     listKind: PrometheusRuleList
     plural: prometheusrules
     singular: prometheusrule
+  preserveUnknownFields: false
   scope: Namespaced
   versions:
   - name: v1
diff --git a/manifests/setup/prometheus-operator-0servicemonitorCustomResourceDefinition.yaml b/manifests/setup/prometheus-operator-0servicemonitorCustomResourceDefinition.yaml
index e9909dbf..69bc9654 100644
--- a/manifests/setup/prometheus-operator-0servicemonitorCustomResourceDefinition.yaml
+++ b/manifests/setup/prometheus-operator-0servicemonitorCustomResourceDefinition.yaml
@@ -12,6 +12,7 @@ spec:
     listKind: ServiceMonitorList
     plural: servicemonitors
     singular: servicemonitor
+  preserveUnknownFields: false
   scope: Namespaced
   versions:
   - name: v1
diff --git a/manifests/setup/prometheus-operator-0thanosrulerCustomResourceDefinition.yaml b/manifests/setup/prometheus-operator-0thanosrulerCustomResourceDefinition.yaml
index 3396c988..a7cff171 100644
--- a/manifests/setup/prometheus-operator-0thanosrulerCustomResourceDefinition.yaml
+++ b/manifests/setup/prometheus-operator-0thanosrulerCustomResourceDefinition.yaml
@@ -12,6 +12,7 @@ spec:
     listKind: ThanosRulerList
     plural: thanosrulers
     singular: thanosruler
+  preserveUnknownFields: false
   scope: Namespaced
   versions:
   - name: v1