diff --git a/src/noise.ts b/src/noise.ts
index 8f75087..746949f 100644
--- a/src/noise.ts
+++ b/src/noise.ts
@@ -49,7 +49,7 @@ export class Noise implements INoiseConnection {
     this.useNoisePipes = false;
 
     if (staticNoiseKey) {
-      const publicKey = Buffer.from(box.keyPair.fromSecretKey(staticNoiseKey)['publicKey']);
+      const publicKey = Buffer.from(box.keyPair.fromSecretKey(staticNoiseKey).publicKey);
       this.staticKeys = {
         privateKey: staticNoiseKey,
         publicKey,
diff --git a/src/utils.ts b/src/utils.ts
index 51426fa..751a9a5 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -12,8 +12,8 @@ const NoiseHandshakePayloadProto = pb.NoiseHandshakePayload;
 
 export function generateKeypair(): KeyPair {
   const keyPair = box.keyPair();
-  const publicKey = Buffer.from(keyPair['publicKey']);
-  const privateKey = Buffer.from(keyPair['secretKey']);
+  const publicKey = Buffer.from(keyPair.publicKey);
+  const privateKey = Buffer.from(keyPair.secretKey);
 
   return {
     publicKey,