diff --git a/lib/platform.browser.js b/lib/platform.browser.js
index c561265..d6a44dd 100644
--- a/lib/platform.browser.js
+++ b/lib/platform.browser.js
@@ -12,11 +12,11 @@ exports.sha512 = function(buf) {
 };
 
 exports.sha256 = function(buf) {
-  return hash.sha256().update(buf).digest();
+  return new Buffer(hash.sha256().update(buf).digest());
 };
 
 exports.ripemd160 = function(buf) {
-  return hash.ripemd160().update(buf).digest();
+  return new Buffer(hash.ripemd160().update(buf).digest());
 };
 
 exports.randomBytes = function(size) {