diff --git a/package.json b/package.json
index 9b00e99..56e3c11 100644
--- a/package.json
+++ b/package.json
@@ -31,6 +31,7 @@
     "@types/chai": "^4.2.8",
     "@types/mocha": "^7.0.1",
     "aegir": "^22.0.0",
+    "buffer": "^5.6.0",
     "chai": "^4.2.0"
   },
   "dependencies": {
diff --git a/test/index.spec.js b/test/index.spec.js
index a64dea4..783df31 100644
--- a/test/index.spec.js
+++ b/test/index.spec.js
@@ -2,10 +2,12 @@
 
 'use strict'
 
+const { Buffer } = require('buffer')
 const expect = require('chai').expect
-const mafmt = require('./../src')
 const multiaddr = require('multiaddr')
 
+const mafmt = require('./../src')
+
 describe('multiaddr validation', function () {
   const goodDNS = [
     '/dns/ipfs.io',