diff --git a/erpnext/stock/doctype/item/item.json b/erpnext/stock/doctype/item/item.json
index 7d2e311..b96dc28 100644
--- a/erpnext/stock/doctype/item/item.json
+++ b/erpnext/stock/doctype/item/item.json
@@ -382,7 +382,7 @@
   {
    "depends_on": "eval:doc.is_stock_item",
    "fieldname": "warranty_period",
-   "fieldtype": "Data",
+   "fieldtype": "Int",
    "label": "Warranty Period (in days)",
    "oldfieldname": "warranty_period",
    "oldfieldtype": "Data"
@@ -1122,4 +1122,4 @@
  "sort_order": "DESC",
  "title_field": "item_name",
  "track_changes": 1
-}
\ No newline at end of file
+}