diff --git a/INSTALL.sh b/INSTALL.sh
index 464003c0..d5834c27 100644
--- a/INSTALL.sh
+++ b/INSTALL.sh
@@ -1077,6 +1077,7 @@ configure_nginx() {
     mkdir -p /etc/nginx/sites-enabled/
     mkdir -p /etc/letsencrypt/
     ln -s /etc/openpanel/nginx/options-ssl-nginx.conf /etc/letsencrypt/options-ssl-nginx.conf
+    openssl dhparam -out /etc/letsencrypt/ssl-dhparams.pem 2048
     mkdir -p /var/log/nginx/domlogs/
     mkdir -p /usr/share/nginx/html/