diff --git a/guestbook-ng.pl b/guestbook-ng.pl
index 6abafb0..38a8f6a 100755
--- a/guestbook-ng.pl
+++ b/guestbook-ng.pl
@@ -44,7 +44,7 @@ under sub ($c) {
     # https://paramdeo.com/blog/opting-your-website-out-of-googles-floc-network
     $c->res->headers->header('Permissions-Policy', 'interest-cohort=()');
 
-    $c->session();
+    $c->session(expiration => 604800);
 
     1;
 };