diff --git a/packages/sdk/CHANGELOG.md b/packages/sdk/CHANGELOG.md
index af99424..10bbca1 100644
--- a/packages/sdk/CHANGELOG.md
+++ b/packages/sdk/CHANGELOG.md
@@ -4,6 +4,10 @@ All notable changes to casper-client-sdk.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## 1.0.23
+
+### Changed
+- Removes use of `Buffer` in `parseKeyPair()` and instead creates new `Uint8Array` concatenating public and private keys for use as secret key in Ed25519 key pair.
 ## 1.0.22
 
 ### Fixed
diff --git a/packages/sdk/package.json b/packages/sdk/package.json
index 5b4b157..6e2881f 100644
--- a/packages/sdk/package.json
+++ b/packages/sdk/package.json
@@ -1,6 +1,6 @@
 {
   "name": "casper-client-sdk",
-  "version": "1.0.22",
+  "version": "1.0.23",
   "license": "Apache 2.0",
   "description": "SDK to interact with the Casper blockchain",
   "main": "dist/index.js",
diff --git a/packages/sdk/src/lib/Keys.ts b/packages/sdk/src/lib/Keys.ts
index 184fe09..49a225c 100644
--- a/packages/sdk/src/lib/Keys.ts
+++ b/packages/sdk/src/lib/Keys.ts
@@ -184,9 +184,12 @@ export class Ed25519 extends AsymmetricKey {
     const publ = Ed25519.parsePublicKey(publicKey);
     const priv = Ed25519.parsePrivateKey(privateKey);
     // nacl expects that the private key will contain both.
+    const secr = new Uint8Array(publ.length + priv.length);
+    secr.set(priv);
+    secr.set(publ, priv.length);
     return new Ed25519({
       publicKey: publ,
-      secretKey: Buffer.concat([priv, publ])
+      secretKey: secr
     });
   }