diff --git a/.npmignore b/.npmignore
index 594c9cf..2ecb80a 100644
--- a/.npmignore
+++ b/.npmignore
@@ -4,3 +4,4 @@
 .prettierrc
 .travis.yml
 yarn.lock
+test/
diff --git a/package.json b/package.json
index 07f8757..f635c95 100644
--- a/package.json
+++ b/package.json
@@ -4,6 +4,7 @@
   "license": "MIT",
   "description": "Allows users to use generators in order to write common functions that can be both sync or async.",
   "main": "index.js",
+  "files": ["index.js"],
   "author": "Logan Smyth <loganfsmyth@gmail.com>",
   "homepage": "https://github.com/loganfsmyth/gensync",
   "repository": {
diff --git a/test/index.test.js b/test/index.test.js
index ca1a269..ea2bf00 100644
--- a/test/index.test.js
+++ b/test/index.test.js
@@ -1,6 +1,6 @@
 "use strict";
 
-const promisify = require("util.promisify");
+const promisify = require("util").promisify;
 const gensync = require("../");
 
 const TEST_ERROR = new Error("TEST_ERROR");