diff --git a/src/Client.php b/src/Client.php
index badefd8..dd5d070 100644
--- a/src/Client.php
+++ b/src/Client.php
@@ -104,8 +104,12 @@ private function registerDefaultLogSendHandler()
         $this->registerLogSendHandler(function (array $logs) {
             $url = getenv('TAIL_LOGS_ENDPOINT') ?: self::LOGS_ENDPOINT;
 
+            $encodedLogs = array_map(function ($log) {
+                return json_encode($log);
+            }, $logs);
+
             $this->guzzle->post($url, [
-                'json' => $logs,
+                'body' => implode("\n", $encodedLogs),
                 'headers' => [
                     'Authorization' => 'Bearer ' . $this->token,
                 ],
@@ -119,7 +123,7 @@ private function registerDefaultApmSendHandler()
             $url = getenv('TAIL_APM_ENDPOINT') ?: self::APM_ENDPOINT;
 
             $this->guzzle->post($url, [
-                'json' => $transaction,
+                'body' => json_encode($transaction),
                 'headers' => [
                     'Authorization' => 'Bearer ' . $this->token,
                 ],
diff --git a/tests/ClientTest.php b/tests/ClientTest.php
index c55d701..d60e815 100644
--- a/tests/ClientTest.php
+++ b/tests/ClientTest.php
@@ -28,10 +28,12 @@ public function test_send_logs()
             ['message' => "message \n2"],
         ];
 
+        $expectEncoded = "{\"message\":\"message 1\"}\n{\"message\":\"message \\n2\"}";
+
         $this->guzzle->shouldReceive('post')->with(
             Client::LOGS_ENDPOINT,
             [
-                'json' => $logs,
+                'body' => $expectEncoded,
                 'headers' => [
                     'Authorization' => 'Bearer secret_token',
                 ],
@@ -71,11 +73,12 @@ public function test_stop_log_sending_chain_with_handler_that_returns_false()
     public function test_send_apm()
     {
         $transaction = ['some' => 'data'];
+        $expectEncoded = "{\"some\":\"data\"}";
 
         $this->guzzle->shouldReceive('post')->with(
             Client::APM_ENDPOINT,
             [
-                'json' => $transaction,
+                'body' => $expectEncoded,
                 'headers' => [
                     'Authorization' => 'Bearer secret_token',
                 ],