diff --git a/package.json b/package.json
index 9fbdc1c..c29ccad 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "merkletreejs",
-  "version": "0.2.14",
+  "version": "0.2.15",
   "description": "Construct Merkle Trees and verify proofs",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",
diff --git a/src/MerkleTree.ts b/src/MerkleTree.ts
index 1753ad8..00be854 100644
--- a/src/MerkleTree.ts
+++ b/src/MerkleTree.ts
@@ -1077,14 +1077,14 @@ export class MerkleTree {
    *```
    */
   private _bufferifyFn (f: any):any {
-    return function (value: any) {
+    return (value: any) => {
       const v = f(value)
       if (Buffer.isBuffer(v)) {
         return v
       }
 
       if (this._isHexString(v)) {
-        return Buffer.from(v, 'hex')
+        return Buffer.from(v.replace('0x', ''), 'hex')
       }
 
       // crypto-js support