diff --git a/packages/ipfs-unixfs-importer/src/options.js b/packages/ipfs-unixfs-importer/src/options.js
index 39efd91e..e1e5b6c6 100644
--- a/packages/ipfs-unixfs-importer/src/options.js
+++ b/packages/ipfs-unixfs-importer/src/options.js
@@ -2,8 +2,6 @@ import mergeOptions from 'merge-options'
 import { sha256 } from 'multiformats/hashes/sha2'
 import { murmur3128 } from '@multiformats/murmur3'
 
-mergeOptions.bind({ ignoreUndefined: true })
-
 /**
  * @param {Uint8Array} buf
  */
@@ -61,5 +59,6 @@ const defaultOptions = {
  * @returns {ImporterOptions}
  */
 export default (options = {}) => {
-  return mergeOptions(defaultOptions, options)
+  const defaults = mergeOptions.bind({ ignoreUndefined: true })
+  return defaults(defaultOptions, options)
 }
diff --git a/packages/ipfs-unixfs/src/unixfs.d.ts b/packages/ipfs-unixfs/src/unixfs.d.ts
index ca5a8549..6a64ac75 100644
--- a/packages/ipfs-unixfs/src/unixfs.d.ts
+++ b/packages/ipfs-unixfs/src/unixfs.d.ts
@@ -1,4 +1,4 @@
-import * as $protobuf from "protobufjs";
+import $protobuf from "protobufjs/minimal.js";
 /** Properties of a Data. */
 export interface IData {