diff --git a/composer.json b/composer.json
index 31472d6..d8a6cd5 100644
--- a/composer.json
+++ b/composer.json
@@ -23,10 +23,10 @@
     "require-dev": {
         "phpunit/phpunit": "~5.7",
         "satooshi/php-coveralls": "^1.0",
-        "swiftmailer/swiftmailer": "~5.4"
+        "swiftmailer/swiftmailer": "~5.4 || ^6.0"
     },
     "suggest": {
-        "swiftmailer/swiftmailer": "Required to send the output of a job to email address/es (~5.4)."
+        "swiftmailer/swiftmailer": "Required to send the output of a job to email address/es (~5.4 || ^6.0)."
     },
     "autoload": {
         "psr-4": {
diff --git a/src/GO/Traits/Mailer.php b/src/GO/Traits/Mailer.php
index 7678576..f42c787 100644
--- a/src/GO/Traits/Mailer.php
+++ b/src/GO/Traits/Mailer.php
@@ -29,7 +29,7 @@ public function getEmailConfig()
         if (! isset($this->emailConfig['transport']) ||
             ! ($this->emailConfig['transport'] instanceof \Swift_Transport)
         ) {
-            $this->emailConfig['transport'] = \Swift_MailTransport::newInstance();
+            $this->emailConfig['transport'] = new \Swift_SendmailTransport();
         }
 
         return $this->emailConfig;
@@ -43,13 +43,11 @@ public function getEmailConfig()
      */
     private function sendToEmails(array $files)
     {
-        $mailer = \Swift_Mailer::newInstance(
-            $this->emailConfig['transport']
-        );
+        $mailer = new \Swift_Mailer($this->emailConfig['transport']);
 
         $config = $this->getEmailConfig();
 
-        $message = \Swift_Message::newInstance()
+        $message = (new \Swift_Message())
             ->setSubject($config['subject'])
             ->setFrom($config['from'])
             ->setTo($this->emailTo)