diff --git a/CHANGELOG.md b/CHANGELOG.md
index 636854c..80f1361 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,9 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](http://keepachangelog.com/) and this project adheres to [Semantic Versioning](http://semver.org/).
 
+[4.0.0-beta.3] - 2022-05-03
+- Updated for Craft 4
+
 ## [1.1.0] - 2022-02-14
 
 ### Fixed
diff --git a/README.md b/README.md
index 9dc6c82..9536329 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@
 [![StyleCI](https://styleci.io/repos/119550758/shield)](https://styleci.io/repos/119550758)
 [![Total Downloads](https://img.shields.io/packagist/dt/rias/craft-width-fieldtype.svg?style=flat-square)](https://packagist.org/packages/rias/craft-width-fieldtype)
 
-# Width Fieldtype plugin for Craft CMS 3.x
+# Width Fieldtype plugin for Craft CMS 4.x
 
 Let users choose from predefined widths
 
@@ -17,7 +17,7 @@ This plugin is licensed under a MIT license, which means that it's completely fr
 
 ## Requirements
 
-This plugin requires Craft CMS 3.0.0.
+This plugin requires Craft CMS 4.0.0-beta.3.
 
 ## Installation
 
diff --git a/composer.json b/composer.json
index a408b49..28b916e 100644
--- a/composer.json
+++ b/composer.json
@@ -2,7 +2,7 @@
     "name": "hybridinteractive/craft-width-fieldtype",
     "description": "Let users choose from predefined widths",
     "type": "craft-plugin",
-    "version": "1.1.0",
+    "version": "4.0.0-beta.3",
     "keywords": [
         "craft",
         "cms",
@@ -22,7 +22,7 @@
         }
     ],
     "require": {
-        "craftcms/cms": "^3.7.0"
+        "craftcms/cms": "^4.0.0-beta.1"
     },
     "repositories": [
         {
diff --git a/src/WidthFieldtype.php b/src/WidthFieldtype.php
index 426c101..2222c52 100644
--- a/src/WidthFieldtype.php
+++ b/src/WidthFieldtype.php
@@ -39,7 +39,7 @@ class WidthFieldtype extends Plugin
     // =========================================================================
 
     /* @inheritdoc */
-    public function init()
+    public function init(): void
     {
         parent::init();
 
diff --git a/src/fields/Width.php b/src/fields/Width.php
index 7aae343..e859d78 100644
--- a/src/fields/Width.php
+++ b/src/fields/Width.php
@@ -14,6 +14,7 @@
 use Craft;
 use craft\base\ElementInterface;
 use craft\base\Field;
+use phpDocumentor\Reflection\Types\This;
 use rias\widthfieldtype\assetbundles\widthfieldtype\WidthFieldtypeAsset;
 use yii\db\Schema;
 
@@ -145,7 +146,7 @@ public function getContentColumnType(): string
      *
      * @return mixed The prepared field value
      */
-    public function normalizeValue($value, ElementInterface $element = null)
+    public function normalizeValue($value, ElementInterface $element = null):? string
     {
         return $value;
     }
@@ -158,7 +159,7 @@ public function normalizeValue($value, ElementInterface $element = null)
      *
      * @return string|null
      */
-    public function getSettingsHtml()
+    public function getSettingsHtml(): string
     {
         // Register our asset bundle
         Craft::$app->getView()->registerAssetBundle(WidthFieldtypeAsset::class);
@@ -229,7 +230,7 @@ public function getInputHtml($value, ElementInterface $element = null): string
      *
      * @return array
      */
-    private static function getOptions()
+    private static function getOptions(): array
     {
         return [
             '1/6'        => Craft::t('width-fieldtype', '1/6'),