diff --git a/README.md b/README.md
index 246eac6..a2ce22a 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,6 @@
 # jsonkdiff
 
-![Build status](https://github.com/grrtbrtr/jsonkdiff/actions/workflows/test.yml/badge.svg)
-![NPM version](https://img.shields.io/npm/v/@grrtbrtr/jsonkdiff)
+![NPM version](https://img.shields.io/npm/v/@grrtbrtr/jsonkdiff?color=blue) ![License](https://img.shields.io/github/license/grrtbrtr/jsonkdiff) ![Build](https://img.shields.io/github/actions/workflow/status/grrtbrtr/jsonkdiff/test.yml) ![Bundle size](https://img.shields.io/bundlephobia/min/@grrtbrtr/jsonkdiff)
 
 A lightweight, zero-dependency CLI tool to compare multiple JSON files and identify missing (non-common) keys.
 It generates a per-file report of unique keys to help identify schema drift.
diff --git a/package-lock.json b/package-lock.json
index c86a021..e7db798 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@grrtbrtr/jsonkdiff",
-  "version": "1.0.1",
+  "version": "1.0.2",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@grrtbrtr/jsonkdiff",
-      "version": "1.0.1",
+      "version": "1.0.2",
       "license": "GPL-3.0-only",
       "bin": {
         "jsonkdiff": "bin/cli.js"
diff --git a/package.json b/package.json
index 54d1e6a..a894515 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@grrtbrtr/jsonkdiff",
-  "version": "1.0.1",
+  "version": "1.0.2",
   "description": "Compare multiple JSON files and find non-common keys. Generates a per-file report of unique keys to help identify schema drift.",
   "keywords": [
     "json",
diff --git a/src/utils/object-utils.js b/src/utils/object-utils.js
index 180dc3e..3019813 100644
--- a/src/utils/object-utils.js
+++ b/src/utils/object-utils.js
@@ -7,14 +7,17 @@
  * @returns {Array.<string>} An array of keys.
  */
 export function getDeepKeys(obj, prefix = '') {
-  let keys = [];
-  for (const key in obj) {
+  return Object.keys(obj).reduce((allKeys, key) => {
     const fullPath = prefix ? `${prefix}.${key}` : key;
-    keys.push(fullPath);
-    
-    if (typeof obj[key] === 'object' && obj[key] !== null && !Array.isArray(obj[key])) {
-      keys = keys.concat(getDeepKeys(obj[key], fullPath));
+    allKeys.push(fullPath);
+
+    if (
+      typeof obj[key] === 'object' &&
+      obj[key] !== null &&
+      !Array.isArray(obj[key])
+    ) {
+      allKeys.push(...getDeepKeys(obj[key], fullPath));
     }
-  }
-  return keys;
+    return allKeys;
+  }, []);
 }
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