diff --git a/charts/cert-manager/templates/webhook-mutating-webhook.yaml b/charts/cert-manager/templates/webhook-mutating-webhook.yaml
index f3db011..9ea2977 100644
--- a/charts/cert-manager/templates/webhook-mutating-webhook.yaml
+++ b/charts/cert-manager/templates/webhook-mutating-webhook.yaml
@@ -15,17 +15,19 @@
     {{- end }}
 webhooks:
   - name: webhook.cert-manager.io
+    {{- with .Values.webhook.mutatingWebhookConfiguration.namespaceSelector }}
+    namespaceSelector:
+      {{- toYaml . | nindent 6 }}
+    {{- end }}
     rules:
       - apiGroups:
           - "cert-manager.io"
-          - "acme.cert-manager.io"
         apiVersions:
           - "v1"
         operations:
           - CREATE
-          - UPDATE
         resources:
-          - "*/*"
+          - "certificaterequests"
     admissionReviewVersions: ["v1"]
     # This webhook only accepts v1 cert-manager resources.
     # Equivalent matchPolicy ensures that non-v1 resource requests are sent to
@@ -43,4 +45,4 @@
         name: {{ template "webhook.fullname" . }}
         namespace: {{ include "cert-manager.namespace" . }}
         path: /mutate
-      {{- end }}
+      {{- end }}
\ No newline at end of file