diff --git a/config/overlays/helm/mutatingwebhook.yaml b/config/overlays/helm/mutatingwebhook.yaml
index 0486f64a9..787a3040b 100644
--- a/config/overlays/helm/mutatingwebhook.yaml
+++ b/config/overlays/helm/mutatingwebhook.yaml
@@ -2,6 +2,8 @@ apiVersion: admissionregistration.k8s.io/v1
 kind: MutatingWebhookConfiguration
 metadata:
   name: mutating-webhook-configuration
+  annotations:
+    cert-manager.io/inject-ca-from: "___'{{ include \"chart.namespace\" . }}/open-feature-operator-serving-cert'___"
 webhooks:
   - name: mutate.openfeature.dev
     failurePolicy: "___{{ .Values.mutatingWebhook.failurePolicy }}___"