diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8685941..fe37b5f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+0.4.0 / 2014-09-24
+------------------
+- dropped `sha512` dependency and upgraded to crypto-browserify that supports sha512
+
 0.3.1 / 2014-07-11
 ------------------
 - removed superfluous code `this._privateKeyBigInteger`
diff --git a/lib/hdkey.js b/lib/hdkey.js
index d605406..c65e50f 100644
--- a/lib/hdkey.js
+++ b/lib/hdkey.js
@@ -5,8 +5,6 @@ var cs = require('coinstring')
 var ecurve = require('ecurve')
 var curve = ecurve.getCurveByName('secp256k1')
 var Point = ecurve.Point
-var sha512 = require('sha512')
-
 
 module.exports = HDKey
 
@@ -118,7 +116,7 @@ HDKey.prototype.deriveChild = function(index) {
     data = Buffer.concat([this.publicKey, indexBuffer])
   }
 
-  var I = sha512.hmac(this.chainCode).finalize(data)
+  var I = crypto.createHmac('sha512', this.chainCode).update(data).digest()
   var IL = I.slice(0, 32)
   var IR = I.slice(32)
 
@@ -161,7 +159,7 @@ HDKey.prototype.deriveChild = function(index) {
 }
 
 HDKey.fromMasterSeed = function(seedBuffer, versions) {
-  var I = sha512.hmac(MASTER_SECRET).finalize(seedBuffer)
+  var I = crypto.createHmac('sha512', MASTER_SECRET).update(seedBuffer).digest()
   var IL = I.slice(0, 32)
   var IR = I.slice(32)
 
diff --git a/package.json b/package.json
index 348e723..8ad5aac 100644
--- a/package.json
+++ b/package.json
@@ -26,11 +26,10 @@
     "mocha-lcov-reporter": "0.0.1",
     "istanbul": "^0.2.10",
     "secure-random": "^1.0.0",
-    "mochify": "^0.9.3",
-    "crypto-browserify": "^2.1.8"
+    "mochify": "^1.1.2",
+    "crypto-browserify": "^3.2.4"
   },
   "dependencies": {
-    "sha512": "0.0.1",
     "bigi": "^1.1.0",
     "ecurve": "^1.0.0",
     "coinstring": "^2.0.0"
@@ -39,8 +38,5 @@
     "unit": "./node_modules/.bin/mocha",
     "coverage": "./node_modules/.bin/istanbul cover ./node_modules/.bin/_mocha -- --reporter list test/*.js",
     "coveralls": "npm run-script coverage && node ./node_modules/.bin/coveralls < coverage/lcov.info"
-  },
-  "browser": {
-    "crypto": "crypto-browserify"
   }
 }