diff --git a/package-lock.json b/package-lock.json
index a8e1d33..d38c346 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -2281,11 +2281,6 @@
       "integrity": "sha1-Z29us8OZl8LuGsOpJP1hJHSPV40=",
       "dev": true
     },
-    "core-js": {
-      "version": "2.6.9",
-      "resolved": "https://registry.npmjs.org/core-js/-/core-js-2.6.9.tgz",
-      "integrity": "sha512-HOpZf6eXmnl7la+cUdMnLvUxKNqLUzJvgIziQ0DiF3JwSImNphIqdGqzj6hIKyX04MmV0poclQ7+wjWvxQyR2A=="
-    },
     "core-js-compat": {
       "version": "3.1.4",
       "resolved": "https://registry.npmjs.org/core-js-compat/-/core-js-compat-3.1.4.tgz",
diff --git a/package.json b/package.json
index 10d53cb..51c0c46 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,6 @@
   },
   "homepage": "https://vue-context.com/docs",
   "dependencies": {
-    "core-js": ">=2.6.5 <3.0.0",
     "vue-clickaway": "^2.2.2"
   },
   "devDependencies": {
diff --git a/src/js/utils.js b/src/js/utils.js
index db81b6b..db79dc7 100644
--- a/src/js/utils.js
+++ b/src/js/utils.js
@@ -1,10 +1,19 @@
-import fromPolyfill from 'core-js/library/fn/array/from';
-import isArrayPolyfill from 'core-js/library/fn/array/is-array';
+if (! Array.from) {
+    Array.from = object => {
+        'use strict';
+
+        return [].slice.call(object);
+    };
+}
+
+if (! Array.isArray) {
+    Array.isArray = arg => Object.prototype.toString.call(arg) === '[object Array]';
+}
 
 // --- Constants ---
-const arrayFrom = Array.from || fromPolyfill;
+const arrayFrom = Array.from;
 
-export const isArray = Array.isArray || isArrayPolyfill;
+export const isArray = Array.isArray;
 
 export const keyCodes = {
     ESC: 27,