diff --git a/e2e/helpers/wallet.helper.ts b/e2e/helpers/wallet.helper.ts
index f188c34..b7e310a 100644
--- a/e2e/helpers/wallet.helper.ts
+++ b/e2e/helpers/wallet.helper.ts
@@ -41,7 +41,7 @@ export class WalletHelper {
             switch (type) {
                 case 'p2wpkh':
                     output = payments.p2wpkh({
-                        pubkey: child.publicKey,
+                        pubkey: Buffer.from(child.publicKey),
                         network: networks.regtest,
                     });
                     break;