diff --git a/cluster-autoscaler/cloudprovider/externalgrpc/examples/certmanager-manifests/ca.yaml b/cluster-autoscaler/cloudprovider/externalgrpc/examples/certmanager-manifests/ca.yaml
index c7c71bd249..36b61a40bc 100644
--- a/cluster-autoscaler/cloudprovider/externalgrpc/examples/certmanager-manifests/ca.yaml
+++ b/cluster-autoscaler/cloudprovider/externalgrpc/examples/certmanager-manifests/ca.yaml
@@ -7,6 +7,7 @@ spec:
   isCA: true
   commonName: selfsigned-ca
   secretName: ca-root-secret
+  duration: 87600h
   privateKey:
     algorithm: ECDSA
     size: 256