diff --git a/package.json b/package.json
index 0ec6d56..5f7aec9 100644
--- a/package.json
+++ b/package.json
@@ -45,8 +45,8 @@
   "dependencies": {
     "aes-js": "^3.1.1",
     "bs58check": "^2.1.2",
+    "ethereum-cryptography": "^0.1.3",
     "ethereumjs-util": "^7.0.2",
-    "hdkey": "^2.0.1",
     "randombytes": "^2.0.6",
     "scrypt-js": "^3.0.1",
     "utf8": "^3.0.0",
diff --git a/src/hdkey.ts b/src/hdkey.ts
index 6c6f5d4..295c728 100644
--- a/src/hdkey.ts
+++ b/src/hdkey.ts
@@ -1,6 +1,6 @@
 import Wallet from './index'
 
-const HDKey = require('hdkey')
+import { HDKey } from 'ethereum-cryptography/hdkey'
 
 export default class EthereumHDKey {
   /**