diff --git a/index.js b/index.js
index 9c48504..5288635 100644
--- a/index.js
+++ b/index.js
@@ -1,13 +1,12 @@
 'use strict';
 
 const split = require('split-string');
-const flatten = require('arr-flatten');
 const union = require('union-value');
 const forOwn = require('for-own');
 const typeOf = require('kind-of');
 const get = require('get-value');
 
-function groupFn(arr, props) {
+function groupFn(arr, ...props) {
   if (arr == null) {
     return [];
   }
@@ -20,7 +19,7 @@ function groupFn(arr, props) {
     return arr;
   }
 
-  let args = flatten([].slice.call(arguments, 1));
+  let args = props.flat(Infinity);
   let groups = groupBy(arr, args[0]);
 
   for (let i = 1; i < args.length; i++) {
diff --git a/package.json b/package.json
index e33c1df..57c63cb 100644
--- a/package.json
+++ b/package.json
@@ -20,13 +20,12 @@
   ],
   "main": "index.js",
   "engines": {
-    "node": ">=8"
+    "node": ">=11.0.0"
   },
   "scripts": {
     "test": "mocha"
   },
   "dependencies": {
-    "arr-flatten": "^1.1.0",
     "for-own": "^1.0.0",
     "get-value": "^3.0.1",
     "kind-of": "^6.0.2",