diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..c2658d7
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+node_modules/
diff --git a/index.js b/index.js
index 0c093cf..60d9bc9 100644
--- a/index.js
+++ b/index.js
@@ -1,12 +1,13 @@
-Object.defineProperty(Error.prototype, 'toJSON', {
-    value: function () {
-        var alt = {};
+const fclone = require('fclone');
+
 
-        Object.getOwnPropertyNames(this).forEach(function (key) {
-            alt[key] = this[key];
-        }, this);
+if ('toJSON' in Error.prototype) {
+  return;
+}
 
-        return alt;
+Object.defineProperty(Error.prototype, 'toJSON', {
+    value: function () {
+        return fclone(this);
     },
     configurable: true,
     writable: true
diff --git a/package.json b/package.json
index e23853e..a3cf94c 100644
--- a/package.json
+++ b/package.json
@@ -20,5 +20,8 @@
   "bugs": {
     "url": "https://github.com/AVVS/error-tojson/issues"
   },
-  "homepage": "https://github.com/AVVS/error-tojson"
+  "homepage": "https://github.com/AVVS/error-tojson",
+  "dependencies": {
+    "fclone": "^1.0.11"
+  }
 }