diff --git a/data/conf/nginx/templates/sites-default.conf.j2 b/data/conf/nginx/templates/sites-default.conf.j2
index 84bd8eae4..6904d185e 100644
--- a/data/conf/nginx/templates/sites-default.conf.j2
+++ b/data/conf/nginx/templates/sites-default.conf.j2
@@ -12,7 +12,7 @@ ssl_session_cache shared:SSL:50m;
 ssl_session_timeout 1d;
 ssl_session_tickets off;
 
-add_header Strict-Transport-Security "max-age=15768000;";
+add_header Strict-Transport-Security "max-age=31536000;";
 add_header X-Content-Type-Options nosniff;
 add_header X-Robots-Tag none;
 add_header X-Download-Options noopen;