diff --git a/phpstan-baseline.neon b/phpstan-baseline.neon
index f5caf89..74a2cb4 100644
--- a/phpstan-baseline.neon
+++ b/phpstan-baseline.neon
@@ -60,26 +60,6 @@ parameters:
 			count: 1
 			path: src/Provider/WebToPay/Adapter/PaymentRedirectRequestNormalizer.php
 
-		-
-			message: "#^Method Paysera\\\\CheckoutSdk\\\\Provider\\\\WebToPay\\\\Adapter\\\\PaymentValidationResponseNormalizer\\:\\:denormalize\\(\\) has parameter \\$providerResponse with no value type specified in iterable type array\\.$#"
-			count: 1
-			path: src/Provider/WebToPay/Adapter/PaymentValidationResponseNormalizer.php
-
-		-
-			message: "#^Method Paysera\\\\CheckoutSdk\\\\Provider\\\\WebToPay\\\\Adapter\\\\PaymentValidationResponseNormalizer\\:\\:getOrderFromProviderResponse\\(\\) has parameter \\$providerResponse with no value type specified in iterable type array\\.$#"
-			count: 1
-			path: src/Provider/WebToPay/Adapter/PaymentValidationResponseNormalizer.php
-
-		-
-			message: "#^Method Paysera\\\\CheckoutSdk\\\\Provider\\\\WebToPay\\\\Adapter\\\\PaymentValidationResponseNormalizer\\:\\:getProviderProperty\\(\\) has no return type specified\\.$#"
-			count: 1
-			path: src/Provider/WebToPay/Adapter/PaymentValidationResponseNormalizer.php
-
-		-
-			message: "#^Method Paysera\\\\CheckoutSdk\\\\Provider\\\\WebToPay\\\\Adapter\\\\PaymentValidationResponseNormalizer\\:\\:getProviderProperty\\(\\) has parameter \\$providerResponse with no value type specified in iterable type array\\.$#"
-			count: 1
-			path: src/Provider/WebToPay/Adapter/PaymentValidationResponseNormalizer.php
-
 		-
 			message: "#^Method Paysera\\\\CheckoutSdk\\\\Service\\\\TranslatableLogoInterface\\:\\:getLogos\\(\\) return type with generic class Paysera\\\\CheckoutSdk\\\\Entity\\\\Collection\\\\TranslationCollection does not specify its types\\: Translation$#"
 			count: 1
diff --git a/src/Entity/PaymentCallbackValidationResponse.php b/src/Entity/PaymentCallbackValidationResponse.php
index 2b18c2a..58193bd 100644
--- a/src/Entity/PaymentCallbackValidationResponse.php
+++ b/src/Entity/PaymentCallbackValidationResponse.php
@@ -121,8 +121,6 @@ class PaymentCallbackValidationResponse
 
     private ?string $type = null;
 
-    private ?string $refundTimestamp = null;
-
     public function __construct(int $projectId, Order $order, int $status)
     {
         $this->projectId = $projectId;
diff --git a/src/Provider/WebToPay/Adapter/PaymentValidationResponseNormalizer.php b/src/Provider/WebToPay/Adapter/PaymentValidationResponseNormalizer.php
index 84332c6..dbe711f 100644
--- a/src/Provider/WebToPay/Adapter/PaymentValidationResponseNormalizer.php
+++ b/src/Provider/WebToPay/Adapter/PaymentValidationResponseNormalizer.php
@@ -18,6 +18,9 @@ public function __construct(TypeConverter $typeConverter)
         $this->typeConverter = $typeConverter;
     }
 
+    /**
+     * @param array<string, mixed> $providerResponse
+     */
     public function denormalize(array $providerResponse): PaymentCallbackValidationResponse
     {
         $order = $this->getOrderFromProviderResponse($providerResponse);
@@ -50,6 +53,9 @@ public function denormalize(array $providerResponse): PaymentCallbackValidationR
         ;
     }
 
+    /**
+     * @param array<string, mixed> $providerResponse
+     */
     protected function getRefundFromProviderResponse(array $providerResponse): ?Refund
     {
         if (!isset($providerResponse['refund_timestamp'])) {
@@ -64,6 +70,9 @@ protected function getRefundFromProviderResponse(array $providerResponse): ?Refu
         );
     }
 
+    /**
+     * @param array<string, mixed> $providerResponse
+     */
     protected function getOrderFromProviderResponse(array $providerResponse): Order
     {
         $order = new Order(
@@ -83,6 +92,10 @@ protected function getOrderFromProviderResponse(array $providerResponse): Order
         ;
     }
 
+    /**
+     * @param array<string, mixed> $providerResponse
+     * @return mixed
+     */
     protected function getProviderProperty(
         string $propertyName,
         array $providerResponse,