diff --git a/index.js b/index.js
index 35501cb..5d7c02b 100644
--- a/index.js
+++ b/index.js
@@ -155,7 +155,7 @@ module.exports = class NoiseSecretStream extends Duplex {
             this._message = b4a.allocUnsafe(this._len)
           }
 
-          data.copy(this._message, this._tmp, offset)
+          b4a.copy(data, this._message, this._tmp, offset)
           this._tmp += unprocessed
 
           if (end <= data.length) {
@@ -208,7 +208,7 @@ module.exports = class NoiseSecretStream extends Duplex {
         const expectedId = streamId(this.handshakeHash, !this.isInitiator)
         const header = message.subarray(32)
 
-        if (!expectedId.equals(remoteId)) {
+        if (!b4a.equals(expectedId, remoteId)) {
           this.destroy(new Error('Invalid header received'))
           return
         }
diff --git a/lib/handshake.js b/lib/handshake.js
index 2be702b..0ccda3d 100644
--- a/lib/handshake.js
+++ b/lib/handshake.js
@@ -1,8 +1,9 @@
 const sodium = require('sodium-universal')
 const curve = require('noise-curve-ed')
 const Noise = require('noise-handshake')
+const b4a = require('b4a')
 
-const EMPTY = Buffer.alloc(0)
+const EMPTY = b4a.alloc(0)
 
 module.exports = class Handshake {
   constructor (isInitiator, keyPair, remotePublicKey, pattern) {
@@ -14,8 +15,8 @@ module.exports = class Handshake {
   }
 
   static keyPair (seed) {
-    const publicKey = Buffer.alloc(32)
-    const secretKey = Buffer.alloc(64)
+    const publicKey = b4a.alloc(32)
+    const secretKey = b4a.alloc(64)
     if (seed) sodium.crypto_sign_seed_keypair(publicKey, secretKey, seed)
     else sodium.crypto_sign_keypair(publicKey, secretKey)
     return { publicKey, secretKey }
@@ -37,7 +38,7 @@ module.exports = class Handshake {
   send () {
     try {
       const data = this.noise.send()
-      const wrap = Buffer.allocUnsafe(data.byteLength + 3)
+      const wrap = b4a.allocUnsafe(data.byteLength + 3)
 
       writeUint24le(data.byteLength, wrap)
       wrap.set(data, 3)
@@ -55,10 +56,10 @@ module.exports = class Handshake {
   }
 
   _return (data) {
-    const tx = this.noise.complete ? toBuffer(this.noise.tx) : null
-    const rx = this.noise.complete ? toBuffer(this.noise.rx) : null
-    const hash = this.noise.complete ? toBuffer(this.noise.hash) : null
-    const remotePublicKey = this.noise.complete ? toBuffer(this.noise.rs) : null
+    const tx = this.noise.complete ? b4a.toBuffer(this.noise.tx) : null
+    const rx = this.noise.complete ? b4a.toBuffer(this.noise.rx) : null
+    const hash = this.noise.complete ? b4a.toBuffer(this.noise.hash) : null
+    const remotePublicKey = this.noise.complete ? b4a.toBuffer(this.noise.rs) : null
 
     return {
       data,
@@ -75,7 +76,3 @@ function writeUint24le (n, buf) {
   buf[1] = (n >>> 8) & 255
   buf[2] = (n >>> 16) & 255
 }
-
-function toBuffer (uint) {
-  return Buffer.from(uint.buffer, uint.byteOffset, uint.byteLength)
-}