diff --git a/application/Espo/Core/Loaders/Base.php b/application/Espo/Core/Loaders/Base.php
index 949e7b54da..6acdf5ade1 100644
--- a/application/Espo/Core/Loaders/Base.php
+++ b/application/Espo/Core/Loaders/Base.php
@@ -33,18 +33,18 @@ use Espo\Core\Container;
 
 /**
  * @deprecated
- * @todo Remove in 6.4.
+ * @todo Remove.
  */
 abstract class Base implements Loader
 {
-    protected $container;
+    protected $container; /** @phpstan-ignore-line */
 
     public function __construct(Container $container)
     {
         $this->container = $container;
     }
 
-    protected function getContainer()
+    protected function getContainer() /** @phpstan-ignore-line */
     {
         return $this->container;
     }
diff --git a/application/Espo/Core/Loaders/BaseLanguage.php b/application/Espo/Core/Loaders/BaseLanguage.php
index 3c0996e913..3d8690f0df 100644
--- a/application/Espo/Core/Loaders/BaseLanguage.php
+++ b/application/Espo/Core/Loaders/BaseLanguage.php
@@ -38,9 +38,9 @@ use Espo\Core\{
 
 class BaseLanguage implements Loader
 {
-    private $injectableFactory;
+    private InjectableFactory $injectableFactory;
 
-    protected $config;
+    protected Config $config;
 
     public function __construct(InjectableFactory $injectableFactory, Config $config)
     {
diff --git a/application/Espo/Core/Loaders/DataManager.php b/application/Espo/Core/Loaders/DataManager.php
index 952bf31098..7220904d9b 100644
--- a/application/Espo/Core/Loaders/DataManager.php
+++ b/application/Espo/Core/Loaders/DataManager.php
@@ -37,7 +37,7 @@ use Espo\Core\{
 
 class DataManager implements Loader
 {
-    protected $injectableFactory;
+    private InjectableFactory $injectableFactory;
 
     public function __construct(InjectableFactory $injectableFactory)
     {
diff --git a/application/Espo/Core/Loaders/DateTime.php b/application/Espo/Core/Loaders/DateTime.php
index b7188f279e..08b98159a0 100644
--- a/application/Espo/Core/Loaders/DateTime.php
+++ b/application/Espo/Core/Loaders/DateTime.php
@@ -37,7 +37,7 @@ use Espo\Core\{
 
 class DateTime implements Loader
 {
-    protected $config;
+    private Config $config;
 
     public function __construct(Config $config)
     {