diff --git a/lib/crypto/hash.js b/lib/crypto/hash.js
index 01e4d1547..1a019098d 100644
--- a/lib/crypto/hash.js
+++ b/lib/crypto/hash.js
@@ -27,7 +27,7 @@ Hash.sha256sha256 = function(buf) {
 
 Hash.ripemd160 = function(buf) {
   $.checkArgument(BufferUtil.isBuffer(buf));
-  return crypto.createHash('ripemd160').update(buf).digest();
+  return crypto.createHash('rmd160').update(buf).digest();
 };
 
 Hash.sha256ripemd160 = function(buf) {
diff --git a/lib/privatekey.js b/lib/privatekey.js
index f820cae09..c9271ac77 100644
--- a/lib/privatekey.js
+++ b/lib/privatekey.js
@@ -336,8 +336,7 @@ PrivateKey.prototype.toBigNumber = function(){
  * @returns {Buffer} A buffer of the private key
  */
 PrivateKey.prototype.toBuffer = function(){
-  // TODO: use `return this.bn.toBuffer({ size: 32 })` in v1.0.0
-  return this.bn.toBuffer();
+  return this.bn.toBuffer({ size: 32 });
 };
 
 /**