diff --git a/Creating-packs.md b/Creating-packs.md
index 5f803c7..22920f2 100644
--- a/Creating-packs.md
+++ b/Creating-packs.md
@@ -39,4 +39,12 @@ Notes:
 2. Run `sticker-pack <pack directory>`.
    * If you want to override the pack displayname, pass `--title <custom title>`.
    * Pass `--add-to-index web/packs/` if you want to automatically add the
-     generated pack to your sticker picker.
\ No newline at end of file
+     generated pack to your sticker picker.
+
+## Updating old packs for authenticated media
+As of March 2025, maunium-stickerpicker works around Matrix's authenticated media
+requirements by hosting thumbnails of stickers next to the sticker pack metadata.
+To update old packs, you can run `sticker-download-thumbnails path/to/pack.json`,
+which will download all the media using your access token and store thumbnails in
+the `thumbnails` directory next to the pack JSON. The thumbnails should then be
+served along with the JSON files (if using GitHub pages, just commit the images).
\ No newline at end of file