diff --git a/application/Espo/Core/Field/LinkMultiple.php b/application/Espo/Core/Field/LinkMultiple.php
index 42a50c16a4..19c5bdec8c 100644
--- a/application/Espo/Core/Field/LinkMultiple.php
+++ b/application/Espo/Core/Field/LinkMultiple.php
@@ -38,17 +38,12 @@ use RuntimeException;
  */
 class LinkMultiple
 {
-    private $list = [];
-
     /**
      * @param LinkMultipleItem[] $list
-     *
      * @throws RuntimeException
      */
-    public function __construct(array $list = [])
+    public function __construct(private array $list = [])
     {
-        $this->list = $list;
-
         $this->validateList();
     }
 
diff --git a/application/Espo/Core/FieldProcessing/LinkMultiple/ListLoader.php b/application/Espo/Core/FieldProcessing/LinkMultiple/ListLoader.php
index 26c5eea554..b7b7926268 100644
--- a/application/Espo/Core/FieldProcessing/LinkMultiple/ListLoader.php
+++ b/application/Espo/Core/FieldProcessing/LinkMultiple/ListLoader.php
@@ -41,15 +41,11 @@ use Espo\ORM\Defs as OrmDefs;
  */
 class ListLoader implements LoaderInterface
 {
-    private OrmDefs $ormDefs;
-
     /** @var array<string, string[]> */
-    private $fieldListCacheMap = [];
+    private array $fieldListCacheMap = [];
 
-    public function __construct(OrmDefs $ormDefs)
-    {
-        $this->ormDefs = $ormDefs;
-    }
+    public function __construct(private OrmDefs $ormDefs)
+    {}
 
     public function process(Entity $entity, Params $params): void
     {
diff --git a/application/Espo/Core/FieldProcessing/Loader/Params.php b/application/Espo/Core/FieldProcessing/Loader/Params.php
index 5349215b6a..6c033839b6 100644
--- a/application/Espo/Core/FieldProcessing/Loader/Params.php
+++ b/application/Espo/Core/FieldProcessing/Loader/Params.php
@@ -34,10 +34,8 @@ namespace Espo\Core\FieldProcessing\Loader;
  */
 class Params
 {
-    /**
-     * @var ?string[]
-     */
-    private $select = null;
+    /** @var ?string[] */
+    private ?array $select = null;
 
     public function __construct() {}
 
diff --git a/application/Espo/Core/FieldProcessing/ReadLoadProcessor.php b/application/Espo/Core/FieldProcessing/ReadLoadProcessor.php
index 61350fdf74..fb6272ffc8 100644
--- a/application/Espo/Core/FieldProcessing/ReadLoadProcessor.php
+++ b/application/Espo/Core/FieldProcessing/ReadLoadProcessor.php
@@ -41,7 +41,7 @@ use Espo\Core\Utils\Metadata;
 class ReadLoadProcessor
 {
     /** @var array<string, Loader<Entity>[]> */
-    private $loaderListMapCache = [];
+    private array $loaderListMapCache = [];
 
     public function __construct(
         private InjectableFactory $injectableFactory,
diff --git a/application/Espo/Core/FieldValidation/FieldValidationManager.php b/application/Espo/Core/FieldValidation/FieldValidationManager.php
index e8cc3b9627..14eca5a6aa 100644
--- a/application/Espo/Core/FieldValidation/FieldValidationManager.php
+++ b/application/Espo/Core/FieldValidation/FieldValidationManager.php
@@ -46,9 +46,9 @@ use ReflectionClass;
 class FieldValidationManager
 {
     /** @var array<string, ?object> */
-    private $checkerCache = [];
+    private array $checkerCache = [];
     /** @var array<string, ?Validator<Entity>> */
-    private $validatorCache = [];
+    private array $validatorCache = [];
 
     private CheckerFactory $checkerFactory;
 
diff --git a/application/Espo/Core/MassAction/Jobs/Process.php b/application/Espo/Core/MassAction/Jobs/Process.php
index ab30a8f6b1..596cfb9867 100644
--- a/application/Espo/Core/MassAction/Jobs/Process.php
+++ b/application/Espo/Core/MassAction/Jobs/Process.php
@@ -35,9 +35,7 @@ use Espo\Core\Job\Job\Data as JobData;
 use Espo\Core\MassAction\MassActionFactory;
 use Espo\Core\MassAction\Result;
 use Espo\Core\Utils\Language;
-
 use Espo\ORM\EntityManager;
-
 use Espo\Entities\MassAction as MassActionEntity;
 use Espo\Entities\Notification;
 use Espo\Entities\User;
@@ -46,21 +44,11 @@ use Throwable;
 
 class Process implements Job
 {
-    private $entityManager;
-
-    private $factory;
-
-    private $language;
-
     public function __construct(
-        EntityManager $entityManager,
-        MassActionFactory $factory,
-        Language $language
-    ) {
-        $this->entityManager = $entityManager;
-        $this->factory = $factory;
-        $this->language = $language;
-    }
+        private EntityManager $entityManager,
+        private MassActionFactory $factory,
+        private Language $language
+    ) {}
 
     public function run(JobData $data): void
     {
diff --git a/application/Espo/Core/MassAction/Params.php b/application/Espo/Core/MassAction/Params.php
index 95a68338ba..336b3bc696 100644
--- a/application/Espo/Core/MassAction/Params.php
+++ b/application/Espo/Core/MassAction/Params.php
@@ -40,7 +40,7 @@ class Params
 {
     private string $entityType;
     /** @var ?string[] */
-    private $ids = null;
+    private ?array $ids = null;
     private ?SearchParams $searchParams = null;
 
     private function __construct() {}
diff --git a/application/Espo/Core/Record/Service.php b/application/Espo/Core/Record/Service.php
index 223076c104..79d970e717 100644
--- a/application/Espo/Core/Record/Service.php
+++ b/application/Espo/Core/Record/Service.php
@@ -185,10 +185,8 @@ class Service implements Crud,
     protected $selectBuilderFactory;
     /** @var RecordHookManager */
     protected $recordHookManager;
-    /** @var ?ListLoadProcessor */
-    private $listLoadProcessor = null;
-    /** @var ?DuplicateFinder */
-    private $duplicateFinder = null;
+    private ?ListLoadProcessor $listLoadProcessor = null;
+    private ?DuplicateFinder $duplicateFinder = null;
     private ?LinkCheck $linkCheck = null;
 
     protected const MAX_SELECT_TEXT_ATTRIBUTE_LENGTH = 10000;
diff --git a/application/Espo/Core/Utils/Database/Orm/Converter.php b/application/Espo/Core/Utils/Database/Orm/Converter.php
index 72731d9c2e..e60fb83d25 100644
--- a/application/Espo/Core/Utils/Database/Orm/Converter.php
+++ b/application/Espo/Core/Utils/Database/Orm/Converter.php
@@ -46,7 +46,7 @@ use LogicException;
 class Converter
 {
     /** @var ?array<string, mixed> */
-    private $entityDefs = null;
+    private ?array $entityDefs = null;
 
     private string $defaultAttributeType = Entity::VARCHAR;
 
@@ -54,7 +54,7 @@ class Converter
     private const INDEX_TYPE_INDEX = 'index';
 
     /** @var array<string, int> */
-    private $defaultLengthMap = [
+    private array $defaultLengthMap = [
         Entity::VARCHAR => 255,
         Entity::INT => 11,
     ];
@@ -64,7 +64,7 @@ class Converter
      *
      * @var array<string, string>
      */
-    private $paramMap = [
+    private array $paramMap = [
         'type' => 'type',
         'dbType' => 'dbType',
         'maxLength' => 'len',
@@ -90,14 +90,14 @@ class Converter
     ];
 
     /** @var array<string, mixed> */
-    private $idParams = [];
+    private array $idParams = [];
 
     /**
      * Permitted entityDefs parameters which will be copied to ormMetadata.
      *
      * @var string[]
      */
-    private $permittedEntityOptions = [
+    private array $permittedEntityOptions = [
         'indexes',
         'additionalTables',
     ];
diff --git a/application/Espo/Core/Utils/Metadata/Helper.php b/application/Espo/Core/Utils/Metadata/Helper.php
index c4d69ebbed..d4ad0b4fa9 100644
--- a/application/Espo/Core/Utils/Metadata/Helper.php
+++ b/application/Espo/Core/Utils/Metadata/Helper.php
@@ -44,7 +44,7 @@ class Helper
      *
      * @var string[]
      */
-    private $copiedDefParams = [
+    private array $copiedDefParams = [
         'readOnly',
         'disabled',
         'notStorable',