diff --git a/k8s/infrastructure-config/cert-manager/clusterissuer.yaml b/k8s/infrastructure-config/cert-manager/clusterissuer.yaml
index 6183562..68eb29c 100644
--- a/k8s/infrastructure-config/cert-manager/clusterissuer.yaml
+++ b/k8s/infrastructure-config/cert-manager/clusterissuer.yaml
@@ -4,7 +4,7 @@ metadata:
   name: n0ball-tw-issuer
 spec:
   acme:
-    server: https://acme-v2.api.letsencrypt.org/directory
+    server: https://acme-v02.api.letsencrypt.org/directory
     email: admin@n0ball.tw
     privateKeySecretRef:
       name: letsencrypt-account-key