diff --git a/src/nginxconfig.ejs b/src/nginxconfig.ejs
index efbcc989f..c21a1ab4e 100644
--- a/src/nginxconfig.ejs
+++ b/src/nginxconfig.ejs
@@ -58,17 +58,16 @@ server {
     ssl_certificate      <%= certFilePath %>;
     ssl_certificate_key  <%= keyFilePath %>;
     ssl_session_timeout  5m;
-    ssl_session_cache shared:SSL:50m;
+    ssl_session_cache shared:MozSSL:10m;  # about 40000 sessions
+    ssl_session_tickets off;
 
-    # https://bettercrypto.org/static/applied-crypto-hardening.pdf
-    # https://mozilla.github.io/server-side-tls/ssl-config-generator/
-    # https://cipherli.st/
     # https://raymii.org/s/tutorials/Strong_SSL_Security_On_nginx.html
-    ssl_prefer_server_ciphers on;
-    ssl_protocols TLSv1.2 TLSv1.3; # don't use SSLv3 ref: POODLE
+    # https://github.com/ssllabs/research/wiki/SSL-and-TLS-Deployment-Best-Practices#25-use-forward-secrecy
+    # ciphers according to https://ssl-config.mozilla.org/#server=nginx&version=1.14.0&config=intermediate&openssl=1.1.1&guideline=5.4
+    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;
 
-    # ciphers according to https://mozilla.github.io/server-side-tls/ssl-config-generator/?server=nginx-1.10.3&openssl=1.0.2g&hsts=yes&profile=modern
-    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_dhparam /home/yellowtent/boxdata/dhparams.pem;
     add_header Strict-Transport-Security "max-age=15768000";