diff --git a/dnsapi.md b/dnsapi.md
index 84b8d52..dd445ef 100644
--- a/dnsapi.md
+++ b/dnsapi.md
@@ -1112,7 +1112,7 @@ export MYDNSJP_Password=Password
 To issue a certificate:
 
 ```sh
-./acme.sh --issue --dns dns_mydnsjp -d example.com -d www.example.com
+./acme.sh --issue --dns dns_mydnsjp -d example.com -d *.example.com
 ```
 The `MYDNSJP_MasterID` and `MYDNSJP_Password` will be saved in `~/.acme.sh/account.conf` and will be reused when needed.