diff --git a/lib/crypto.js b/lib/crypto.js
index 5f419a8..420121c 100644
--- a/lib/crypto.js
+++ b/lib/crypto.js
@@ -104,15 +104,15 @@ var encrypted = exports.encrypted = {
     assert(buf.readUInt16BE(16, true) === SECP256K1_TYPE, "Bad curve type");
     assert(buf.readUInt16BE(18, true) === 32, "Bad Rx length");
     assert(buf.readUInt16BE(52, true) === 32, "Bad Ry length");
-    var iv = new Buffer(16);
+    var iv = Buffer.alloc(16);
     buf.copy(iv, 0, 0, 16);
-    var ephemPublicKey = new Buffer(70);
+    var ephemPublicKey = Buffer.alloc(70);
     buf.copy(ephemPublicKey, 0, 16, 86);
     // NOTE(Kagami): We do copy instead of slice to protect against
     // possible source buffer modification by user.
-    var ciphertext = new Buffer(buf.length - 118);
+    var ciphertext = Buffer.alloc(buf.length - 118);
     buf.copy(ciphertext, 0, 86, buf.length - 32);
-    var mac = new Buffer(32);
+    var mac = Buffer.alloc(32);
     buf.copy(mac, 0, buf.length - 32);
     return {
       iv: iv,