diff --git a/dir.go b/dir.go
index 36e83b1..c39a22d 100644
--- a/dir.go
+++ b/dir.go
@@ -274,10 +274,12 @@ func (d *Dir) write(dstDir string, task *Task) error {
 	return nil
 }
 
-// sort sorts the directory's pages by date.
+// sort sorts the directory's pages by weight, then date, then filepath.
 func (d *Dir) sort() {
 	sort.Slice(d.Pages, func(i, j int) bool {
-		return d.Pages[i].Date.After(d.Pages[j].Date)
+		pi, pj := d.Pages[i], d.Pages[j]
+		return pi.Weight < pj.Weight || pi.Date.Before(pj.Date) ||
+			pi.FilePath < pj.FilePath
 	})
 
 	for i := range d.Pages {