diff --git a/index.js b/index.js
index 872e614..a91e0bd 100644
--- a/index.js
+++ b/index.js
@@ -1,7 +1,7 @@
 require('es6-shim')
 const ethUtil = require('ethereumjs-util')
 const ethHashUtil = require('./util.js')
-const xor = require('bitwise-xor')
+const xor = require('buffer-xor')
 const BN = ethUtil.BN
 const rlp = ethUtil.rlp
 const async = require('async')
diff --git a/package.json b/package.json
index 8616ae5..aff7962 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,7 @@
   "homepage": "https://github.com/ethereumjs/ethashjs#readme",
   "dependencies": {
     "async": "^1.4.2",
-    "bitwise-xor": "^0.0.0",
+    "buffer-xor": "^1.0.3",
     "es6-shim": "^0.33.13",
     "ethereumjs-util": "^2.3.1",
     "miller-rabin": "^4.0.0"