diff --git a/admin_manual/installation/nginx-subdir.conf.sample b/admin_manual/installation/nginx-subdir.conf.sample
index 5ad2eca1f..afe3bc070 100644
--- a/admin_manual/installation/nginx-subdir.conf.sample
+++ b/admin_manual/installation/nginx-subdir.conf.sample
@@ -103,7 +103,7 @@ server {
         # will add the domain to a hardcoded list that is shipped
         # in all major browsers and getting removed from this list
         # could take several months.
-        #add_header Strict-Transport-Security "max-age=15768000; includeSubDomains; preload;" always;
+        #add_header Strict-Transport-Security "max-age=31536000; includeSubDomains; preload" always;
 
         # HTTP response headers borrowed from Nextcloud `.htaccess`
         add_header Referrer-Policy                   "no-referrer"       always;