diff --git a/packages/components/tree/better-directory-sort.ts b/packages/components/tree/better-directory-sort.ts
index 5063858..ecc64d3 100644
--- a/packages/components/tree/better-directory-sort.ts
+++ b/packages/components/tree/better-directory-sort.ts
@@ -1,3 +1,5 @@
+// https://www.npmjs.com/package/better-directory-sort
+
 function defaultComparator(a, b) {
   return a.localeCompare(b, undefined, {
     numeric: true,