diff --git a/service/attestation/attestation-agent/agent/src/restapi/mod.rs b/service/attestation/attestation-agent/agent/src/restapi/mod.rs
index 0570060bc7117cea9259b8a3a187e2c0ceafaa47..2745443cd55aa9696a2e1624cb6f4f9f7a4dca6e 100644
--- a/service/attestation/attestation-agent/agent/src/restapi/mod.rs
+++ b/service/attestation/attestation-agent/agent/src/restapi/mod.rs
@@ -78,7 +78,7 @@ pub async fn verify_evidence(
 ) -> Result<HttpResponse> {
     let request = request.0;
     log::debug!("verify evidence request: {:?}", request);
-    let challenge = base64_url::decode(&"request.challenge".to_string())
+    let challenge = base64_url::decode(&request.challenge)
         .map_err(|err|AgentError::DecodeError(err.to_string()))?;
     let evidence = request.evidence;
     let policy_id =  request.policy_id;