diff --git a/benchmark/common.js b/benchmark/common.js
index 52dfb4011..667c741cd 100644
--- a/benchmark/common.js
+++ b/benchmark/common.js
@@ -1,5 +1,5 @@
 function binaryBuffer(n) {
-  var buffer = new Buffer(n);
+  var buffer = Buffer.alloc(n);
 
   for (var i = 0; i < n; i++) {
     buffer.writeUInt8(i&255, i);
diff --git a/lib/core.js b/lib/core.js
index 8ca545690..f74248859 100644
--- a/lib/core.js
+++ b/lib/core.js
@@ -8,7 +8,6 @@
 var fs = require('fs');
 var glob = require('glob');
 var async = require('async');
-var _ = { extend: require('lodash.assign') };
 var path = require('path');
 var util = require('archiver-utils');
 
@@ -639,7 +638,7 @@ Archiver.prototype.directory = function(dirpath, destpath, data) {
 
   function onGlobMatch(match){
     var ignoreMatch = false;
-    var entryData = _.extend({}, data);
+    var entryData = Object.assign({}, data);
     entryData.name = match;
     entryData.prefix = destpath;
     match = globber._makeAbs(match);
@@ -729,7 +728,7 @@ Archiver.prototype.glob = function(pattern, options, data) {
   }
 
   function onGlobMatch(match){
-    var entryData = _.extend({}, data);
+    var entryData = Object.assign({}, data);
 
     if (options.cwd) {
       entryData.name = match;
diff --git a/package.json b/package.json
index f9638d95d..c8ea1f962 100644
--- a/package.json
+++ b/package.json
@@ -21,7 +21,7 @@
     "lib"
   ],
   "engines": {
-    "node": ">= 4"
+    "node": ">= 6"
   },
   "scripts": {
     "test": "mocha --reporter dot",
@@ -33,7 +33,6 @@
     "async": "^2.0.0",
     "buffer-crc32": "^0.2.1",
     "glob": "^7.0.0",
-    "lodash.assign": "^4.2.0",
     "readable-stream": "^2.0.0",
     "tar-stream": "^1.5.0",
     "zip-stream": "^1.2.0"
diff --git a/test/helpers/index.js b/test/helpers/index.js
index 22957fa74..05cb597ad 100644
--- a/test/helpers/index.js
+++ b/test/helpers/index.js
@@ -21,7 +21,7 @@ function adjustDateByOffset(d, offset) {
 module.exports.adjustDateByOffset = adjustDateByOffset;
 
 function binaryBuffer(n) {
-  var buffer = new Buffer(n);
+  var buffer = Buffer.alloc(n);
 
   for (var i = 0; i < n; i++) {
     buffer.writeUInt8(i&255, i);
@@ -35,7 +35,7 @@ module.exports.binaryBuffer = binaryBuffer;
 function BinaryStream(size, options) {
   Readable.call(this, options);
 
-  var buf = new Buffer(size);
+  var buf = Buffer.alloc(size);
 
   for (var i = 0; i < size; i++) {
     buf.writeUInt8(i&255, i);