diff --git a/nginx.conf b/nginx.conf
index 8dd15fe..54f9e0a 100644
--- a/nginx.conf
+++ b/nginx.conf
@@ -19,4 +19,5 @@ server {
     add_header X-Content-Type-Options "nosniff" always;
     add_header X-XSS-Protection "1; mode=block" always;
     add_header Referrer-Policy "strict-origin-when-cross-origin" always;
+    add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;
 }