diff --git a/etc/caddy/Caddyfile b/etc/caddy/Caddyfile
index 962303d..30c0d02 100644
--- a/etc/caddy/Caddyfile
+++ b/etc/caddy/Caddyfile
@@ -1,3 +1,7 @@
+{
+	acme_ca https://acme.zerossl.com/v2/DV90
+	email kou029w@gmail.com
+}
 keiu.net {
 	file_server
 }
diff --git a/etc/coredns/Corefile b/etc/coredns/Corefile
index 71fc986..173a649 100644
--- a/etc/coredns/Corefile
+++ b/etc/coredns/Corefile
@@ -4,7 +4,7 @@ https://dns.keiu.net tls://dns.keiu.net {
 	}
 }
 https://. tls://. {
-	tls /var/lib/caddy/data/caddy/certificates/acme-v02.api.letsencrypt.org-directory/dns.keiu.net/dns.keiu.net.crt /var/lib/caddy/data/caddy/certificates/acme-v02.api.letsencrypt.org-directory/dns.keiu.net/dns.keiu.net.key
+	tls /var/lib/caddy/data/caddy/certificates/acme.zerossl.com-v2-dv90/dns.keiu.net/dns.keiu.net.crt /var/lib/caddy/data/caddy/certificates/acme.zerossl.com-v2-dv90/dns.keiu.net/dns.keiu.net.key
 	hosts {
 		fallthrough
 	}