diff --git a/execute-procure-to-pay/cc-invoice-approval-process/Submit-the-invoice_UISchema.json b/execute-procure-to-pay/cc-invoice-approval-process/Submit-the-invoice_UISchema.json
index b35563d3..55b4071f 100644
--- a/execute-procure-to-pay/cc-invoice-approval-process/Submit-the-invoice_UISchema.json
+++ b/execute-procure-to-pay/cc-invoice-approval-process/Submit-the-invoice_UISchema.json
@@ -18,6 +18,11 @@
   },
   "invoice.dueDate": {
     "ui:widget": "date"
+  },
+    "filesAccept": {
+    "ui:options": {
+      "accept": ".pdf"
+    }
   },
   "ui:order": [
     "invoice.contributorName",