diff --git a/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.json b/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.json
index 1c5c060..534b879 100644
--- a/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.json
+++ b/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.json
@@ -548,7 +548,8 @@
    "fieldname": "is_subcontracted",
    "fieldtype": "Check",
    "label": "Is Subcontracted",
-   "print_hide": 1
+   "print_hide": 1,
+   "read_only": 1
   },
   {
    "fieldname": "items_section",
diff --git a/erpnext/stock/doctype/purchase_receipt/purchase_receipt.json b/erpnext/stock/doctype/purchase_receipt/purchase_receipt.json
index b3d3885..a70415d 100755
--- a/erpnext/stock/doctype/purchase_receipt/purchase_receipt.json
+++ b/erpnext/stock/doctype/purchase_receipt/purchase_receipt.json
@@ -443,7 +443,8 @@
    "label": "Is Subcontracted",
    "oldfieldname": "is_subcontracted",
    "oldfieldtype": "Select",
-   "print_hide": 1
+   "print_hide": 1,
+   "read_only": 1
   },
   {
    "depends_on": "eval:doc.is_subcontracted",