diff --git a/p-transaction.yml b/p-transaction.yml
index 5aadcf0d..4feec7e5 100644
--- a/p-transaction.yml
+++ b/p-transaction.yml
@@ -299,6 +299,9 @@ components:
           description: "Free-form object to be included in response. Must be object, not list or simple value.
                 Do not affect document processing. Use it freely to pass your app params. Stored in process logs."
           additionalProperties: true
+        dtc:
+          type: string
+          description: "Digital Travel Credential (DTC-VC) data in base64 format for processing"
       required:
         - processParam