diff --git a/CHANGELOG.md b/CHANGELOG.md
index 66a951f..1e88a14 100755
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,11 @@
 ## Unreleased
 
 
+## 2.0.0-beta.1 - 2022-08-23
+### Added
+- Support for Craft 4
+
+
 ## 1.5.1 – 2022-08-23
 ### Fixed
 - Fix an incorrect default value for the `highlight.pre_tags` & 
diff --git a/composer.json b/composer.json
index 90532b9..c9172f4 100755
--- a/composer.json
+++ b/composer.json
@@ -23,7 +23,7 @@
         }
     ],
     "require": {
-        "craftcms/cms": "^3.5.0",
+        "craftcms/cms": "^4.0.0",
         "yiisoft/yii2-elasticsearch": "^2.1.0"
     },
     "autoload": {
diff --git a/src/Elasticsearch.php b/src/Elasticsearch.php
index e81fa8f..f91acbe 100755
--- a/src/Elasticsearch.php
+++ b/src/Elasticsearch.php
@@ -60,7 +60,7 @@ class Elasticsearch extends Plugin
     public const EVENT_ERROR_NO_ATTACHMENT_PROCESSOR = 'errorNoAttachmentProcessor';
     public const PLUGIN_HANDLE = 'elasticsearch';
 
-    public $hasCpSettings = true;
+    public bool $hasCpSettings = true;
 
     public function init(): void
     {
diff --git a/src/controllers/CpController.php b/src/controllers/CpController.php
index 1e21d5a..8e5e7b5 100644
--- a/src/controllers/CpController.php
+++ b/src/controllers/CpController.php
@@ -28,7 +28,8 @@ class CpController extends Controller
 {
     /** @var ElasticsearchPlugin */
     public $plugin;
-    public $allowAnonymous = ['testConnection', 'reindexPerformAction'];
+
+    protected array|bool|int $allowAnonymous = ['testConnection', 'reindexPerformAction'];
 
     public function init(): void
     {
@@ -169,7 +170,7 @@ protected function getSiteIds(Request $request): array
      * @throws \Exception If reindexing the entry fails for some reason.
      * @throws \yii\web\BadRequestHttpException if the request body is missing a `params` property
      */
-    protected function reindexElement()
+    protected function reindexElement(): ?string
     {
         $request = Craft::$app->getRequest();
 
diff --git a/src/jobs/IndexElementJob.php b/src/jobs/IndexElementJob.php
index 2329eee..0eafcf3 100755
--- a/src/jobs/IndexElementJob.php
+++ b/src/jobs/IndexElementJob.php
@@ -32,7 +32,7 @@ class IndexElementJob extends BaseJob
     /**
      * @inheritdoc
      */
-    public function execute($queue)
+    public function execute($queue): void
     {
         $sites = Craft::$app->getSites();
         $site = $sites->getSiteById($this->siteId);
diff --git a/src/services/ElementIndexerService.php b/src/services/ElementIndexerService.php
index 365c95f..04a7466 100755
--- a/src/services/ElementIndexerService.php
+++ b/src/services/ElementIndexerService.php
@@ -218,6 +218,7 @@ protected function getElementIndexableContent(Element $element)
                         'preview/preview',
                         [
                             'elementType' => get_class($element),
+                            'canonicalId' => $element->canonicalId,
                             'sourceId'    => $element->id,
                             'siteId'      => $element->siteId,
                             'draftId'     => null,
diff --git a/src/utilities/RefreshElasticsearchIndexUtility.php b/src/utilities/RefreshElasticsearchIndexUtility.php
index b650ce9..e0e25f6 100755
--- a/src/utilities/RefreshElasticsearchIndexUtility.php
+++ b/src/utilities/RefreshElasticsearchIndexUtility.php
@@ -46,7 +46,7 @@ public static function id(): string
      * Returns the path to the utility's SVG icon.
      * @return string|null The path to the utility SVG icon
      */
-    public static function iconPath()
+    public static function iconPath(): ?string
     {
         return Craft::getAlias('@lhs/elasticsearch/resources/cp/img/utility-icon.svg');
     }