diff --git a/jsonnet/kube-prometheus/prometheus-operator/prometheus-operator.libsonnet b/jsonnet/kube-prometheus/prometheus-operator/prometheus-operator.libsonnet
index 3286402632eb3decc8241537304a1ae197d14bdf..365553d605f07beebbc6d5f7d0461961f06c3144 100644
--- a/jsonnet/kube-prometheus/prometheus-operator/prometheus-operator.libsonnet
+++ b/jsonnet/kube-prometheus/prometheus-operator/prometheus-operator.libsonnet
@@ -33,13 +33,6 @@ local k = import 'ksonnet/ksonnet.beta.3/k.libsonnet';
       local clusterRole = k.rbac.v1.clusterRole;
       local policyRule = clusterRole.rulesType;
 
-      local extensionsRule = policyRule.new() +
-                             policyRule.withApiGroups(['extensions']) +
-                             policyRule.withResources([
-                               'thirdpartyresources',
-                             ]) +
-                             policyRule.withVerbs(['*']);
-
       local apiExtensionsRule = policyRule.new() +
                                 policyRule.withApiGroups(['apiextensions.k8s.io']) +
                                 policyRule.withResources([
@@ -102,7 +95,7 @@ local k = import 'ksonnet/ksonnet.beta.3/k.libsonnet';
                             ]) +
                             policyRule.withVerbs(['list', 'watch']);
 
-      local rules = [extensionsRule, apiExtensionsRule, monitoringRule, appsRule, coreRule, podRule, routingRule, nodeRule, namespaceRule];
+      local rules = [apiExtensionsRule, monitoringRule, appsRule, coreRule, podRule, routingRule, nodeRule, namespaceRule];
 
       clusterRole.new() +
       clusterRole.mixin.metadata.withName('prometheus-operator') +
diff --git a/manifests/0prometheus-operator-clusterRole.yaml b/manifests/0prometheus-operator-clusterRole.yaml
index 8c85391fc70d1ad1b040c6f76fea660486fd013f..94f5ce09a85a89f54eb0761a0e92b7a789544a98 100644
--- a/manifests/0prometheus-operator-clusterRole.yaml
+++ b/manifests/0prometheus-operator-clusterRole.yaml
@@ -3,12 +3,6 @@ kind: ClusterRole
 metadata:
   name: prometheus-operator
 rules:
-- apiGroups:
-  - extensions
-  resources:
-  - thirdpartyresources
-  verbs:
-  - '*'
 - apiGroups:
   - apiextensions.k8s.io
   resources: