diff --git a/bundles/nginx/files/site_template b/bundles/nginx/files/site_template
index 72d04b9..7ce70ec 100644
--- a/bundles/nginx/files/site_template
+++ b/bundles/nginx/files/site_template
@@ -18,7 +18,7 @@ server {
     resolver 8.8.8.8 8.8.4.4 valid=300s;
     resolver_timeout 5s;
 
-    add_header Strict-Transport-Security "max-age=31104000; preload";
+    add_header Strict-Transport-Security "max-age=63072000; includeSubDomains";
 
 % if not do_not_set_content_security_headers:
     add_header Referrer-Policy same-origin;