diff --git a/src/Picqer/Financials/Moneybird/Connection.php b/src/Picqer/Financials/Moneybird/Connection.php
index 016136d..833964a 100644
--- a/src/Picqer/Financials/Moneybird/Connection.php
+++ b/src/Picqer/Financials/Moneybird/Connection.php
@@ -420,7 +420,7 @@ public function needsAuthentication()
     private function parseResponse(Response $response)
     {
         try {
-            $response->getBody()->rewind();
+            Psr7\Message::rewindBody($response);
             $json = json_decode($response->getBody()->getContents(), true);
 
             return $json;
@@ -483,7 +483,7 @@ private function acquireAccessToken()
         $response = $this->client()->post($this->getTokenUrl(), $body);
 
         if ($response->getStatusCode() == 200) {
-            $response->getBody()->rewind();
+            Psr7\Message::rewindBody($response);
             $body = json_decode($response->getBody()->getContents(), true);
 
             if (json_last_error() === JSON_ERROR_NONE) {
@@ -517,7 +517,7 @@ private function parseExceptionForErrorMessages(Exception $exception)
             return new ApiException('Response is NULL.', 0, $exception);
         }
 
-        $response->getBody()->rewind();
+        Psr7\Message::rewindBody($response);
         $responseBody = $response->getBody()->getContents();
         $decodedResponseBody = json_decode($responseBody, true);
 
diff --git a/tests/ConnectionTest.php b/tests/ConnectionTest.php
index b85af0b..bf0d9b9 100644
--- a/tests/ConnectionTest.php
+++ b/tests/ConnectionTest.php
@@ -5,6 +5,7 @@
 use GuzzleHttp\Exception\BadResponseException;
 use GuzzleHttp\Middleware;
 use GuzzleHttp\Promise\PromiseInterface;
+use GuzzleHttp\Psr7;
 use PHPUnit\Framework\TestCase;
 use Picqer\Financials\Moneybird\Connection;
 use Picqer\Financials\Moneybird\Entities\Contact;
@@ -109,7 +110,7 @@ public function testClientTriesToGetAccessTokenWhenNoneGiven()
         $request = $this->getRequestFromHistoryContainer();
         $this->assertEquals('POST', $request->getMethod());
 
-        $request->getBody()->rewind();
+        Psr7\Message::rewindBody($request);
         $this->assertEquals(
             'redirect_uri=testRedirectUrl&grant_type=authorization_code&client_id=testClientId&client_secret=testClientSecret&code=testAuthorizationCode',
             $request->getBody()->getContents()