diff --git a/api/apps/chunk_app.py b/api/apps/chunk_app.py
index 9889615a4..1b812fd80 100644
--- a/api/apps/chunk_app.py
+++ b/api/apps/chunk_app.py
@@ -70,7 +70,7 @@ def list_chunk():
                 "important_kwd": sres.field[id].get("important_kwd", []),
                 "question_kwd": sres.field[id].get("question_kwd", []),
                 "image_id": sres.field[id].get("img_id", ""),
-                "available_int": sres.field[id].get("available_int", 1),
+                "available_int": int(sres.field[id].get("available_int", 1)),
                 "positions": json.loads(sres.field[id].get("position_list", "[]")),
             }
             assert isinstance(d["positions"], list)