diff --git a/config/nginx/nginx.conf b/config/nginx/nginx.conf
index 3d2209d..e6b253a 100644
--- a/config/nginx/nginx.conf
+++ b/config/nginx/nginx.conf
@@ -15,7 +15,7 @@ upstream frontend
 
 server
 {
-	listen 443 ssl; # managed by Certbot
+	listen 443 ssl http2; # managed by Certbot
 
 	server_tokens off;
 	server_name crm.logidex.ru www.crm.logidex.ru;
@@ -28,7 +28,7 @@ server
     ssl_certificate /var/www/certbot/live/crm.logidex.ru/fullchain.pem; # managed by Certbot
     ssl_certificate_key /var/www/certbot/live/crm.logidex.ru/privkey.pem; # managed by Certbot
 
-    add_header Strict-Transport-Security "max-age=63072000" always;
+    add_header Strict-Transport-Security "max-age=63072000; includeSubDomains; preload" always;
 
 
     # intermediate configuration
@@ -37,7 +37,7 @@ server
     ssl_session_cache shared:le_nginx_SSL:10m;
     ssl_session_timeout 1440m;
     ssl_session_tickets off;
-    ssl_prefer_server_ciphers off;
+    ssl_prefer_server_ciphers on;
     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_dhparam /var/www/certbot/live/crm.logidex.ru/dhparam.pem; # managed by Certbot
@@ -48,7 +48,7 @@ server
     ssl_stapling_verify on;
 
     # verify chain of trust of OCSP response using Root CA and Intermediate certs
-    ssl_trusted_certificate /var/www/certbot/live/crm.logidex.ru/chain.pem;
+    ssl_trusted_certificate /var/www/certbot/live/crm.logidex.ru/fullchain.pem;
 
     # replace with the IP address of your resolver;
     # async 'resolver' is important for proper operation of OCSP stapling