diff --git a/examples/expressjs-ethr/src/index.ts b/examples/expressjs-ethr/src/index.ts
index 101b846ba..34893d6ff 100644
--- a/examples/expressjs-ethr/src/index.ts
+++ b/examples/expressjs-ethr/src/index.ts
@@ -161,7 +161,7 @@ async function main() {
       type: W3C.ActionTypes.signVp,
       did: identity.did,
       data: {
-        sub: did,
+        aud: did,
         vp: {
           '@context': ['https://www.w3.org/2018/credentials/v1'],
           type: ['VerifiablePresentation'],