diff --git a/ops/nginx/svr-includes/ssl.conf b/ops/nginx/svr-includes/ssl.conf
index 7c610d35e..e36eacd41 100644
--- a/ops/nginx/svr-includes/ssl.conf
+++ b/ops/nginx/svr-includes/ssl.conf
@@ -1,19 +1,18 @@
-# https://mozilla.github.io/server-side-tls/ssl-config-generator/?server=nginx-1.15.9&openssl=1.0.1e&hsts=yes&profile=modern
+# https://ssl-config.mozilla.org/#server=nginx&config=intermediate&ocsp=false
 
 ssl_session_timeout 1d;
-ssl_session_cache shared:SSL:50m;
+ssl_session_cache shared:MozSSL:10m;  # about 40000 sessions
 ssl_session_tickets off;
 
-ssl_protocols TLSv1.2;
-ssl_ciphers 'ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256';
-ssl_prefer_server_ciphers on;
-
 ssl_dhparam /etc/nginx/cert/dhparam.pem;
 
-add_header Strict-Transport-Security "max-age=31536000; includeSubDomains; preload";
+ssl_protocols TLSv1.2 TLSv1.3;
+ssl_ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384;
+ssl_prefer_server_ciphers off;
 
+add_header Strict-Transport-Security "max-age=63072000; includeSubDomains; preload" always;
 
 # https://support.cloudflare.com/hc/en-us/articles/204899617-Authenticated-Origin-Pulls
 
 ssl_client_certificate /etc/nginx/cert/cloudflare.crt;
-ssl_verify_client on;
\ No newline at end of file
+ssl_verify_client on;