diff --git a/src/lib/seed.ts b/src/lib/seed.ts
index a78e6d1..6355b8a 100644
--- a/src/lib/seed.ts
+++ b/src/lib/seed.ts
@@ -3,6 +3,7 @@ import config from "../config";
 import * as bip39 from "@scure/bip39";
 import { wordlist } from "@scure/bip39/wordlists/english";
 import { errorExit } from "./error.js";
+import b4a from "b4a";
 
 const BIP44_PATH = "m/44'/1627'/0'/0'/0'";
 
@@ -24,5 +25,8 @@ export function getHDKey(): HDKey {
 export function getKeyPair(): { publicKey: Uint8Array; secretKey: Uint8Array } {
   const key = getHDKey();
 
-  return { publicKey: key.publicKeyRaw, secretKey: key.privateKey };
+  return {
+    publicKey: key.publicKeyRaw,
+    secretKey: b4a.concat([key.privateKey, key.publicKeyRaw]),
+  };
 }