diff --git a/src/BluescaleMailApi.php b/src/BluescaleMailApi.php
index 06630c4..fa734a0 100644
--- a/src/BluescaleMailApi.php
+++ b/src/BluescaleMailApi.php
@@ -5,6 +5,8 @@ namespace Bluescale\Mail;
 use Bluescale\Mail\BluescaleMailTemplate;
 use GuzzleHttp\Client;
 use Psr\Http\Message\StreamInterface;
+use Symfony\Component\HttpFoundation\File\UploadedFile;
+
 
 class BluescaleMailApi
 {
@@ -43,7 +45,6 @@ class BluescaleMailApi
                     if (!empty($recipient['address']))
                         if ($notifiable_email == $recipient['address'])
                             $notifiable_recipient = true;
-        
 
             if (!$notifiable_recipient)
                 $template->recipients[] = [
@@ -51,10 +52,33 @@ class BluescaleMailApi
                 ];
         }
 
+        $multipart_form = [];
+
+        foreach ($template as $key => $value) {      // Formatting whole template to pass in 'multipart' form
+            if (!is_array($value)) {
+                $multipart_form[] = ['name' => $key, 'contents' => $value];
+                continue;
+            }
+
+            foreach ($value as $multiKey => $multiValue) {
+                $multiName = $key . '[' .$multiKey . ']' . (is_array($multiValue) ? '[' . key($multiValue) . ']' : '' );
+                $data = ['name' => $multiName];
+
+                if ($key === "attachments") {
+                    $data['contents'] = file_get_contents($multiValue['path']);
+                    $data['filename'] = $multiValue['filename'];
+                } else {
+                    $data['contents'] = (is_array($multiValue) ? reset($multiValue) : $multiValue);
+                }
+
+                $multipart_form[] = $data;
+            }
+        }
+
         try {
-             return $client->request('post', $url, [
-                'form_params' => $template,
-                'headers' => [
+      	    return $client->request('post', $url, [
+                 'multipart' => $multipart_form,
+                 'headers' => [
                     'Authorization' => 'Bearer ' . $this->api_key,
                     'Accept' => 'application/json'
                 ]
diff --git a/src/BluescaleMailTemplate.php b/src/BluescaleMailTemplate.php
index ef09161..4e76b6d 100644
--- a/src/BluescaleMailTemplate.php
+++ b/src/BluescaleMailTemplate.php
@@ -26,6 +26,13 @@ class BluescaleMailTemplate implements \JsonSerializable
     public $recipients = [];
 
     /**
+     * The attachments for the message
+     *
+     * @var array
+     */
+    public $attachments = [];
+
+    /**
      * The reply address for the message
      *
      * @var array
@@ -137,6 +144,29 @@ class BluescaleMailTemplate implements \JsonSerializable
     }
 
     /**
+     * @param array $attachments
+     * @return BluescaleMailTemplate
+     */
+    public function attachments(array $attachments): BluescaleMailTemplate
+    {
+        foreach ($attachments as $attachment) {
+            $this->addAttachment($attachment['path'] ?? $attachment['file'], $attachment['filename'] ?? null);
+        }
+
+        return $this;
+    }
+
+    public function addAttachment($file, $filename = null)
+    {
+        $file = is_object($file) && method_exists($file, 'getRealPath') ? $file->getRealPath() : $file;
+
+        $this->attachments[] = [
+            'path' => $file,
+            'filename' => $filename ?? basename($file)
+        ];
+    }
+
+    /**
      * @param string $key
      * @param string $value
      * @return BluescaleMailTemplate
@@ -159,6 +189,7 @@ class BluescaleMailTemplate implements \JsonSerializable
             'sender' => $this->sender,
             'replyTo' => $this->replyTo,
             'recipients' => $this->recipients,
+            'attachments' => $this->attachments,
             'parameters' => $this->parameters,
         ];
     }