diff --git a/main.go b/main.go
index 59f1093..aa9faad 100644
--- a/main.go
+++ b/main.go
@@ -146,8 +146,20 @@ func (src *FeedSource) update(ctx context.Context) {
 	}
 
 	items := feed.Items
-	sort.Slice(items, func(i, j int) bool {
-		return items[i].Updated >= items[j].Updated
+	sort.SliceStable(items, func(i, j int) bool {
+		var d1, d2 time.Time
+		if items[i].PublishedParsed != nil {
+			d1 = *items[i].PublishedParsed
+		} else if items[i].UpdatedParsed != nil {
+			d1 = *items[i].UpdatedParsed
+		}
+
+		if items[j].PublishedParsed != nil {
+			d2 = *items[j].PublishedParsed
+		} else if items[j].UpdatedParsed != nil {
+			d2 = *items[j].UpdatedParsed
+		}
+		return !d1.Before(d2)
 	})
 	src.Title = feed.Title
 	src.Items = items