diff --git a/package.json b/package.json
index c8ec97c..977e7e4 100644
--- a/package.json
+++ b/package.json
@@ -6,6 +6,10 @@
     "url": "https://github.com/khaledosama999/binary-heap.js"
   },
   "main": "./build/index.js",
+  "module": "./build/index.js",
+  "files": [
+    "build"
+  ],
   "types": "./build/index.d.ts",
   "source": "./src/index.ts",
   "scripts": {
@@ -13,14 +17,13 @@
     "build": "rollup -c",
     "git-cz": "./node_modules/.bin/git-cz",
     "husky": "husky init",
-    "_postinstall": "husky install",
+    "postinstall": "husky install",
     "prepublishOnly": "pinst --disable",
     "postpublish": "pinst --enable",
     "lint": "eslint",
     "release:major": "changelog -M && git add CHANGELOG.md && git commit -m 'updated CHANGELOG.md' && npm version major",
     "release:minor": "changelog -m && git add CHANGELOG.md && git commit -m 'updated CHANGELOG.md' && npm version minor",
-    "release:patch": "changelog -p && git add CHANGELOG.md && git commit -m 'updated CHANGELOG.md' && npm version patch",
-    "postinstall": "husky install"
+    "release:patch": "changelog -p && git add CHANGELOG.md && git commit -m 'updated CHANGELOG.md' && npm version patch"
   },
   "keywords": [
     "data",
diff --git a/tsconfig.json b/tsconfig.json
index e43bd85..fc3d0d5 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -5,7 +5,7 @@
     /* Basic Options */
     // "incremental": true,                   /* Enable incremental compilation */
     "target": "es6",                          /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019', 'ES2020', or 'ESNEXT'. */
-    "module": "ESNext",                     /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', 'es2020', or 'ESNext'. */
+    "module": "ES2015",                     /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', 'es2020', or 'ESNext'. */
     // "allowJs": true,                       /* Allow javascript files to be compiled. */
     // "checkJs": true,                       /* Report errors in .js files. */
     // "jsx": "preserve",                     /* Specify JSX code generation: 'preserve', 'react-native', or 'react'. */