diff --git a/application/Espo/Core/Webhook/Manager.php b/application/Espo/Core/Webhook/Manager.php
index 3216dd4528..9338f46dff 100644
--- a/application/Espo/Core/Webhook/Manager.php
+++ b/application/Espo/Core/Webhook/Manager.php
@@ -48,10 +48,19 @@ use Espo\Entities\{
  */
 class Manager
 {
+    /**
+     * @var string
+     */
     private $cacheKey = 'webhooks';
 
+    /**
+     * @var string[]
+     */
     protected $skipAttributeList = ['isFollowed', 'modifiedAt', 'modifiedBy'];
 
+    /**
+     * @var ?array<string,bool>
+     */
     private $data = null;
 
     private $config;
@@ -102,6 +111,9 @@ class Manager
         $this->dataCache->store($this->cacheKey, $this->data);
     }
 
+    /**
+     * @return array<string,bool>
+     */
     private function buildData(): array
     {
         $data = [];
diff --git a/application/Espo/Core/Webhook/Queue.php b/application/Espo/Core/Webhook/Queue.php
index d6ae8ac0fa..b877a7f13b 100644
--- a/application/Espo/Core/Webhook/Queue.php
+++ b/application/Espo/Core/Webhook/Queue.php
@@ -248,6 +248,9 @@ class Queue
         $this->send($webhook, $dataList, $actualItemList);
     }
 
+    /**
+     * @param string[] $forbiddenAttributeList
+     */
     private function prepareItemData(WebhookQueueItem $item, ?User $user, array $forbiddenAttributeList): ?stdClass
     {
         $targetType = $item->get('targetType');
@@ -285,6 +288,10 @@ class Queue
         return $data;
     }
 
+    /**
+     * @param mixed[] $dataList
+     * @param WebhookQueueItem[] $itemList
+     */
     private function send(Webhook $webhook, array $dataList, array $itemList): void
     {
         try {
@@ -324,6 +331,9 @@ class Queue
         $this->log->debug("Webhook Queue: Webhook '" . $webhook->getId()  . "' sent, response code: {$code}.");
     }
 
+    /**
+     * @param WebhookQueueItem[] $itemList
+     */
     protected function failQueueItemList(array $itemList, bool $force = false): void
     {
         foreach ($itemList as $item) {
@@ -331,6 +341,9 @@ class Queue
         }
     }
 
+    /**
+     * @param WebhookQueueItem[] $itemList
+     */
     protected function succeedQueueItemList(array $itemList): void
     {
         foreach ($itemList as $item) {
diff --git a/application/Espo/Core/Webhook/Sender.php b/application/Espo/Core/Webhook/Sender.php
index aee4a5594a..6c8ae93b0f 100644
--- a/application/Espo/Core/Webhook/Sender.php
+++ b/application/Espo/Core/Webhook/Sender.php
@@ -44,13 +44,16 @@ class Sender
 
     private const TIMEOUT = 10;
 
-    private $config;
+    private Config $config;
 
     public function __construct(Config $config)
     {
         $this->config = $config;
     }
 
+    /**
+     * @param array<int,mixed> $dataList
+     */
     public function send(Webhook $webhook, array $dataList): int
     {
         $payload = json_encode($dataList);