diff --git a/103705/schema/etsi_types.schema.json b/103705/schema/etsi_types.schema.json
index d14629af583e01d603a7df7863f72584832de5b7..5761b54ebbec1337ba9e5b762b9e3118418c7397 100644
--- a/103705/schema/etsi_types.schema.json
+++ b/103705/schema/etsi_types.schema.json
@@ -524,7 +524,7 @@
     "IBAN": {
       "type": "string",
       "pattern": "[A-Z]{2}[0-9]{2}[A-Z0-9]{1,30}",
-      "description": "International Bank Account Number according to ISO 13616-1:2020"
+      "description": "International Bank Account Number according to ISO 13616-1:2020, converted to upper-case letters."
     },
     "PaymentCard": {
       "type": "object",