diff --git a/spec/Enabler/PayPalPaymentMethodEnablerSpec.php b/spec/Enabler/PayPalPaymentMethodEnablerSpec.php
index 0ffd1e78..258d2b26 100644
--- a/spec/Enabler/PayPalPaymentMethodEnablerSpec.php
+++ b/spec/Enabler/PayPalPaymentMethodEnablerSpec.php
@@ -35,7 +35,7 @@ function let(
         SellerWebhookRegistrarInterface $sellerWebhookRegistrar
     ): void {
         $this->beConstructedWith(
-            $client, $requestFactory, 'http://base-url.com', $paymentMethodManager, $sellerWebhookRegistrar
+            $client, 'http://base-url.com', $paymentMethodManager, $sellerWebhookRegistrar, $requestFactory
         );
     }
 
diff --git a/src/Api/GenericApi.php b/src/Api/GenericApi.php
index 23b4e642..ac0dcce8 100644
--- a/src/Api/GenericApi.php
+++ b/src/Api/GenericApi.php
@@ -4,21 +4,40 @@
 
 namespace Sylius\PayPalPlugin\Api;
 
-
+use GuzzleHttp\ClientInterface as GuzzleClientInterface;
 use Psr\Http\Client\ClientInterface;
 use Psr\Http\Message\RequestFactoryInterface;
 
 final class GenericApi implements GenericApiInterface
 {
-
     public function __construct(
-        private readonly ClientInterface $client,
-        private readonly RequestFactoryInterface $requestFactory
-    ){
+        private readonly GuzzleClientInterface|ClientInterface $client,
+        private readonly ?RequestFactoryInterface $requestFactory = null,
+    ) {
+        if ($this->client instanceof GuzzleClientInterface) {
+            trigger_deprecation(
+                'sylius/paypal-plugin',
+                '1.6',
+                'Passing GuzzleHttp\ClientInterface as a first argument in the constructor is deprecated and will be removed. Use Psr\Http\Client\ClientInterface instead.',
+            );
+        }
+
+        if (null === $this->requestFactory) {
+            trigger_deprecation(
+                'sylius/paypal-plugin',
+                '1.6',
+                'Not passing $requestFactory to %s constructor is deprecated and will be removed',
+                self::class,
+            );
+        }
     }
 
     public function get(string $token, string $url): array
     {
+        if ($this->client instanceof GuzzleClientInterface && null === $this->requestFactory) {
+            return $this->legacyGet($token, $url);
+        }
+
         $request = $this->requestFactory->createRequest('GET', $url)
             ->withHeader('Authorization', 'Bearer ' . $token)
             ->withHeader('Content-Type', 'application/json')
@@ -26,4 +45,17 @@ public function get(string $token, string $url): array
 
         return (array) json_decode($this->client->sendRequest($request)->getBody()->getContents(), true);
     }
+
+    private function legacyGet(string $token, string $url): array
+    {
+        $response = $this->client->request('GET', $url, [
+            'headers' => [
+                'Authorization' => 'Bearer ' . $token,
+                'Content-Type' => 'application/json',
+                'Accept' => 'application/json',
+            ],
+        ]);
+
+        return (array) json_decode($response->getBody()->getContents(), true);
+    }
 }
diff --git a/src/Enabler/PayPalPaymentMethodEnabler.php b/src/Enabler/PayPalPaymentMethodEnabler.php
index 976131c0..0910d05f 100644
--- a/src/Enabler/PayPalPaymentMethodEnabler.php
+++ b/src/Enabler/PayPalPaymentMethodEnabler.php
@@ -14,6 +14,7 @@
 namespace Sylius\PayPalPlugin\Enabler;
 
 use Doctrine\Persistence\ObjectManager;
+use GuzzleHttp\Client;
 use Psr\Http\Client\ClientInterface;
 use Psr\Http\Message\RequestFactoryInterface;
 use Sylius\Bundle\PayumBundle\Model\GatewayConfigInterface;
@@ -24,12 +25,28 @@
 final class PayPalPaymentMethodEnabler implements PaymentMethodEnablerInterface
 {
     public function __construct(
-        private readonly ClientInterface $client,
-        private readonly RequestFactoryInterface $requestFactory,
+        private readonly Client|ClientInterface $client,
         private readonly string $baseUrl,
         private readonly ObjectManager $paymentMethodManager,
-        private readonly SellerWebhookRegistrarInterface $sellerWebhookRegistrar
+        private readonly SellerWebhookRegistrarInterface $sellerWebhookRegistrar,
+        private readonly ?RequestFactoryInterface $requestFactory = null,
     ) {
+        if ($this->client instanceof Client) {
+            trigger_deprecation(
+                'sylius/paypal-plugin',
+                '1.6',
+                'Passing GuzzleHttp\Client as a first argument in the constructor is deprecated and will be removed. Use Psr\Http\Client\ClientInterface instead.',
+            );
+        }
+
+        if (null === $this->requestFactory) {
+            trigger_deprecation(
+                'sylius/paypal-plugin',
+                '1.6',
+                'Not passing $requestFactory to %s constructor is deprecated and will be removed',
+                self::class,
+            );
+        }
     }
 
     public function enable(PaymentMethodInterface $paymentMethod): void
@@ -38,12 +55,19 @@ public function enable(PaymentMethodInterface $paymentMethod): void
         $gatewayConfig = $paymentMethod->getGatewayConfig();
         $config = $gatewayConfig->getConfig();
 
-        $response = $this->client->sendRequest(
-            $this->requestFactory->createRequest(
-            'GET',
-                    sprintf('%s/seller-permissions/check/%s', $this->baseUrl, (string) $config['merchant_id'])
-            )
-        );
+        if ($this->client instanceof Client && null === $this->requestFactory) {
+            $response = $this->client->request(
+                'GET',
+                sprintf('%s/seller-permissions/check/%s', $this->baseUrl, (string) $config['merchant_id']),
+            );
+        } else {
+            $response = $this->client->sendRequest(
+                $this->requestFactory->createRequest(
+                    'GET',
+                    sprintf('%s/seller-permissions/check/%s', $this->baseUrl, (string) $config['merchant_id']),
+                ),
+            );
+        }
 
         $content = (array) json_decode($response->getBody()->getContents(), true);
         if (!((bool) $content['permissionsGranted'])) {
diff --git a/src/Resources/config/services.xml b/src/Resources/config/services.xml
index 4a5c5f5d..710e258a 100644
--- a/src/Resources/config/services.xml
+++ b/src/Resources/config/services.xml
@@ -232,10 +232,10 @@
             class="Sylius\PayPalPlugin\Enabler\PayPalPaymentMethodEnabler"
         >
             <argument type="service" id="Http\Discovery\Psr18Client" />
-            <argument type="service" id="Psr\Http\Message\RequestFactoryInterface" />
             <argument>%sylius.pay_pal.facilitator_url%</argument>
             <argument type="service" id="sylius.manager.payment_method" />
             <argument type="service" id="Sylius\PayPalPlugin\Registrar\SellerWebhookRegistrarInterface" />
+            <argument type="service" id="Psr\Http\Message\RequestFactoryInterface" />
         </service>
 
         <service