diff --git a/src/Transport/HttpTransport.php b/src/Transport/HttpTransport.php
index 0409802..d09015d 100644
--- a/src/Transport/HttpTransport.php
+++ b/src/Transport/HttpTransport.php
@@ -73,6 +73,7 @@ protected function createRequestPayload(string $method, array $params = []): arr
     protected function sendHttpRequest(array $payload): Response
     {
         return Http::timeout($this->getTimeout())
+            ->acceptJson()
             ->when(
                 $this->hasApiKey(),
                 fn ($http) => $http->withToken($this->getApiKey())
diff --git a/tests/Unit/Transport/HttpTransportTest.php b/tests/Unit/Transport/HttpTransportTest.php
index 701ca77..889e4b5 100644
--- a/tests/Unit/Transport/HttpTransportTest.php
+++ b/tests/Unit/Transport/HttpTransportTest.php
@@ -183,3 +183,22 @@
 
     expect($result)->toBeArray();
 });
+
+it('sends requests with JSON Accept header', function (): void {
+    $transport = new HttpTransport([
+        'url' => 'http://example.com/api',
+        'timeout' => 30,
+    ]);
+
+    Http::fake([
+        'http://example.com/api' => Http::response([
+            'jsonrpc' => '2.0',
+            'id' => '1',
+            'result' => ['status' => 'success'],
+        ]),
+    ]);
+
+    $transport->sendRequest('test/method');
+
+    Http::assertSent(fn ($request) => $request->hasHeader('Accept', 'application/json'));
+});