diff --git a/uploader.py b/uploader.py
index bc3a832..2583611 100644
--- a/uploader.py
+++ b/uploader.py
@@ -168,7 +168,13 @@ def fetch_all_books(cfg: CalibreConfig) -> list[dict]:
     while True:
         resp = client._session.get(
             f"{cfg.url}/ajax/listbooks",
-            params={"draw": 1, "start": start, "length": page_size, "sort": "title", "order": "asc"},
+            params={
+                "draw": 1,
+                # DataTables 1.10+ names
+                "start": start, "length": page_size,
+                # DataTables 1.9.x names (older Calibre-Web)
+                "iDisplayStart": start, "iDisplayLength": page_size,
+            },
             timeout=60,
         )
         resp.raise_for_status()