diff --git a/index.js b/index.js
index 1f30da2..7774a03 100644
--- a/index.js
+++ b/index.js
@@ -20,9 +20,9 @@ module.exports.compress = function compress(input) {
 }
 
 module.exports.uncompress = function uncompress(input, opt = { asBuffer: true }) {
-  return _uncompress(input, Boolean(opt.asBuffer))
+  return _uncompress(Buffer.isBuffer(input) ? input : Buffer.from(input), Boolean(opt.asBuffer))
 }
 
 module.exports.uncompressSync = function uncompressSync(input, opt = { asBuffer: true }) {
-  return _uncompressSync(input, Boolean(opt.asBuffer))
+  return _uncompressSync(Buffer.isBuffer(input) ? input : Buffer.from(input), Boolean(opt.asBuffer))
 }