diff --git a/hyperledger-proposals.yaml b/hyperledger-proposals.yaml
index dc7bb50..ee75080 100644
--- a/hyperledger-proposals.yaml
+++ b/hyperledger-proposals.yaml
@@ -1,7 +1,7 @@
 openapi: "3.0.0"
 info:
   description: "This is the Proposal Definition for the UC4 API."
-  version: "0.13.1"
+  version: "0.18.1"
   title: "UC4"
 tags:
 - name: "Proposals"
@@ -22,29 +22,25 @@ components:
     UnsignedTransaction:
       type: "object"
       properties:
-        unsignedTransaction:
+        unsignedTransactionJwt:
           type: string
-          format: Base64
     SignedTransaction:
       type: "object"
       properties:
-        unsignedTransaction:
+        unsignedTransactionJwt:
           type: string
-          format: Base64
         signature:
           type: string
     UnsignedProposal:
       type: "object"
       properties:
-        unsignedProposal:
+        unsignedProposalJwt:
           type: string
-          format: Base64
     SignedProposal:
       type: "object"
       properties:
-        unsignedProposal:
+        unsignedProposalJwt:
           type: string
-          format: Base64
         signature:
           type: string
 externalDocs: