diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 0000000..bd0ddd7
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,16 @@
+; This file is for unifying the coding style for different editors and IDEs.
+; More information at http://editorconfig.org
+
+root = false
+
+[*]
+indent_style = space
+indent_size = 4
+charset = "utf-8"
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.yml]
+indent_style = space
+indent_size = 2
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..3d7e132
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+vendor/
+composer.lock
+.phpunit.result.cache
diff --git a/README.md b/README.md
index 871a9df..471f130 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,5 @@
 # cakephp3-ip-filter
-restrict access by ip address for CakePHP3 Component
+restrict access by ip address for CakePHP4 Component
 
 ## Installation
 
diff --git a/composer.json b/composer.json
index 2b8db40..f5e7735 100644
--- a/composer.json
+++ b/composer.json
@@ -1,15 +1,14 @@
-    
 {
     "name": "tyrellsys/cakephp3-ip-filter",
-    "description": "restrict access by ip address for CakePHP3",
+    "description": "restrict access by ip address for CakePHP4",
     "type": "cakephp-plugin",
     "require": {
-        "php": ">=5.6",
-        "cakephp/cakephp": "~3.6",
-        "jalle19/php-whitelist-check": "^1.0"
+        "php": ">=7.2",
+        "cakephp/cakephp": "^4.0",
+        "wikimedia/ip-utils": "5.0.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "^5.7|^6.0"
+        "phpunit/phpunit": "^8.5"
     },
     "autoload": {
         "psr-4": {
diff --git a/src/Controller/Component/IpFilterComponent.php b/src/Controller/Component/IpFilterComponent.php
index 2de8761..bda7ad6 100644
--- a/src/Controller/Component/IpFilterComponent.php
+++ b/src/Controller/Component/IpFilterComponent.php
@@ -4,7 +4,7 @@
 use Cake\Controller\Component;
 use Cake\Controller\ComponentRegistry;
 use Cake\Http\Exception\ForbiddenException;
-use Whitelist\Check;
+use Wikimedia\IPSet;
 
 /**
  * IpFilter component
@@ -28,9 +28,8 @@ class IpFilterComponent extends Component
      */
     public function check($ip = null)
     {
-        $checker = new Check();
         if (is_null($ip)) {
-            $request = clone $this->request;
+            $request = clone $this->getController()->getRequest();
             $request->trustProxy = filter_var($this->getConfig('trustProxy', true), FILTER_VALIDATE_BOOLEAN);
             $ip = $request->clientIP();
         }
@@ -40,9 +39,9 @@ public function check($ip = null)
             $whitelist = explode(",", $whitelist);
         }
 
-        $checker->whitelist($whitelist);
+        $ipset = new IPSet($whitelist);
 
-        return $checker->check($ip);
+        return $ipset->match($ip);
     }
 
     /**
diff --git a/tests/TestCase/Controller/Component/IpFilterComponentTest.php b/tests/TestCase/Controller/Component/IpFilterComponentTest.php
index 0dd6e72..0a61b5a 100644
--- a/tests/TestCase/Controller/Component/IpFilterComponentTest.php
+++ b/tests/TestCase/Controller/Component/IpFilterComponentTest.php
@@ -27,7 +27,7 @@ class IpFilterComponentTest extends TestCase
      *
      * @return void
      */
-    public function setUp()
+    public function setUp(): void
     {
         parent::setUp();
         $this->_oSERVER = $_SERVER;
@@ -53,7 +53,7 @@ public function setUp()
      *
      * @return void
      */
-    public function tearDown()
+    public function tearDown(): void
     {
         parent::tearDown();
 
@@ -121,11 +121,11 @@ public function testCheckNoTrustProxy($ip)
 
     /**
      * test checkOrFail method
-     * @expectedException \Cake\Http\Exception\ForbiddenException
      * @return void
      */
      public function testCheckOrFail()
      {
+         $this->expectException(\Cake\Http\Exception\ForbiddenException::class);
          $this->Controller->IpFilter->checkOrFail('127.0.0.1');
      }
 }
diff --git a/tests/bootstrap.php b/tests/bootstrap.php
index 3834ac3..8a107ce 100644
--- a/tests/bootstrap.php
+++ b/tests/bootstrap.php
@@ -19,8 +19,10 @@
 $root = $findRoot(__FILE__);
 unset($findRoot);
 
-require $root . '/vendor/autoload.php';
+require_once 'vendor/cakephp/cakephp/src/basics.php';
 
-require $root . '/config/bootstrap.php';
+require $root . '/vendor/autoload.php';
 
 $_SERVER['PHP_SELF'] = '/';
+
+error_reporting(E_ALL);