diff --git a/examples/zkapps/04-zkapp-browser-ui/ui/src/pages/zkappWorkerClient.ts b/examples/zkapps/04-zkapp-browser-ui/ui/src/pages/zkappWorkerClient.ts
index d6f1714bc..c97c2ab9b 100644
--- a/examples/zkapps/04-zkapp-browser-ui/ui/src/pages/zkappWorkerClient.ts
+++ b/examples/zkapps/04-zkapp-browser-ui/ui/src/pages/zkappWorkerClient.ts
@@ -9,7 +9,7 @@ import * as Comlink from "comlink";
 
 export default class ZkappWorkerClient {
   // ---------------------------------------------------------------------------------------
-
+  worker: Worker;
   // Proxy to interact with the worker's methods as if they were local
   remoteApi: Comlink.Remote<typeof import('./zkappWorker').api>;
 
@@ -34,7 +34,7 @@ export default class ZkappWorkerClient {
 
   fetchAccount(publicKey: PublicKey): Promise<ReturnType<typeof fetchAccount>> {
     console.log('publicKey', publicKey);
-    return this.remoteApi.fetchAccount(PublicKey.toBase58(publicKey));
+    return this.remoteApi.fetchAccount(publicKey);
   }
 
   initZkappInstance(publicKey: PublicKey) {