diff --git a/.eslintrc b/.eslintrc
index 9f9ba6b..f96d009 100644
--- a/.eslintrc
+++ b/.eslintrc
@@ -1,7 +1,8 @@
 {
   "extends": "strongloop",
   "env": {
-    "node": true
+    "node": true,
+    "es6": true
   },
   "parserOptions": { "ecmaVersion": 6 },
   "rules": {
diff --git a/headless_zip.js b/headless_zip.js
index dfb4903..9dab196 100644
--- a/headless_zip.js
+++ b/headless_zip.js
@@ -16,6 +16,7 @@
 'use strict';
 
 var fs = require('fs');
+var fsPromise = require('fs/promises');
 var path = require('path');
 var JSZip = require('jszip');
 
@@ -85,14 +86,19 @@ module.exports.headlessZip = function headlessZip(dirToZip) {
 
   if (fs.existsSync(dirToZip)) {
     var zip = new JSZip();
-    var files = fs.readdirSync(dirToZip);
-    for (var i = 0, len = files.length; i < len; i++) {
-      zip.file(files[i], fs.readFileSync(path.join(dirToZip, files[i])), {
-        compression: 'DEFLATE',
-      });
-    }
-    fs.writeFileSync(outputFileName, zip.generate({ type: 'nodebuffer', compression: 'DEFLATE' }));
-    deleteDir(dirToZip);
+
+    fsPromise.readdir(dirToZip)
+      .then(files => {
+        let getFileAndContents = file => fsPromise.readFile(path.join(dirToZip, file))
+          .then(contents => { return { file, contents }; });
+        return Promise.all(files.map(getFileAndContents));
+      })
+      .then(files => {
+        files.forEach(({file, contents}) => zip.file(file, contents, {compression: 'DEFLATE'}));
+        return zip.generateAsync({type: 'nodebuffer', compression: 'DEFLATE'});
+      })
+      .then(buffer => fsPromise.writeFile(outputFileName, buffer))
+      .then(() => { deleteDir(dirToZip); });
   }
 };
 
diff --git a/package.json b/package.json
index d7c5c81..dedca4a 100644
--- a/package.json
+++ b/package.json
@@ -6,12 +6,12 @@
   },
   "description": "Node Application Metrics",
   "dependencies": {
+    "ibmapm-embed": ">=19.9.0",
+    "jszip": "^3.7.1",
     "nan": "2.x",
     "node-gyp": "5.x",
-    "tar": "4.x",
     "semver": "^5.3.0",
-    "jszip": "2.5.x",
-    "ibmapm-embed": ">=19.9.0"
+    "tar": "4.x"
   },
   "devDependencies": {
     "codecov": "^3.1.0",