diff --git a/web3.js/src/account.ts b/web3.js/src/account.ts
index 3dd26429d2..c2a4e02fe7 100644
--- a/web3.js/src/account.ts
+++ b/web3.js/src/account.ts
@@ -23,7 +23,7 @@ export class Account {
    *
    * @param secretKey Secret key for the account
    */
-  constructor(secretKey?: Buffer | Uint8Array | Array<number>) {
+  constructor(secretKey?: Uint8Array | Array<number>) {
     if (secretKey) {
       const secretKeyBuffer = toBuffer(secretKey);
       if (secretKey.length !== 64) {