diff --git a/deploy/cloud/manifests/mock-cert.yaml.tmpl b/deploy/cloud/manifests/mock-cert.yaml.tmpl
index 8224d5c34f4..30c56fa01c7 100644
--- a/deploy/cloud/manifests/mock-cert.yaml.tmpl
+++ b/deploy/cloud/manifests/mock-cert.yaml.tmpl
@@ -16,6 +16,7 @@ spec:
     name: selfsigned-issuer
     kind: ClusterIssuer
   commonName: {{ .cloudDomain }}
+  duration: 867240h # 99 year
   dnsNames:
     - '{{ .cloudDomain }}'
     - '*.{{ .cloudDomain }}'