diff --git a/nodejs/README.md b/nodejs/README.md
index 63e75db..c59f465 100755
--- a/nodejs/README.md
+++ b/nodejs/README.md
@@ -56,6 +56,8 @@ openssl req -new -newkey rsa:2048 -days 3650 -nodes -x509   -subj '/CN=sni-suppo
 
 openssl req -new -newkey rsa:2048 -days 3650 -nodes -x509   -subj '/CN=sni-support-required-for-valid-ssl'   -keyout /etc/ssl/resty-auto-ssl-fallback.key   -out /etc/ssl/resty-auto-ssl-fallback.crt
 
+openssl dhparam -out /etc/nginx/dhparam.pem 4096
+
 ```