diff --git a/src/CL/Slack/Model/Attachment.php b/src/CL/Slack/Model/Attachment.php
index 1307548b..8a76881c 100644
--- a/src/CL/Slack/Model/Attachment.php
+++ b/src/CL/Slack/Model/Attachment.php
@@ -74,7 +74,9 @@ class Attachment extends AbstractModel
      * @var AttachmentField[]|ArrayCollection
      */
     private $fields;
-    
+
+    private $footer;
+
     /**
      * @var Array
      */
@@ -278,4 +280,20 @@ public function getMrkdwnIn()
     {
     	return $this->mrkdwnIn;
     }
+
+    /**
+     * @return mixed
+     */
+    public function getFooter()
+    {
+        return $this->footer;
+    }
+
+    /**
+     * @param mixed $footer
+     */
+    public function setFooter($footer)
+    {
+        $this->footer = $footer;
+    }
 }
diff --git a/src/CL/Slack/Payload/ReactionsPayload.php b/src/CL/Slack/Payload/ReactionsPayload.php
new file mode 100644
index 00000000..e34172bd
--- /dev/null
+++ b/src/CL/Slack/Payload/ReactionsPayload.php
@@ -0,0 +1,70 @@
+<?php
+
+/*
+ * This file is part of the Slack API library.
+ *
+ * (c) Cas Leentfaar <info@casleentfaar.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace CL\Slack\Payload;
+
+/**
+ * @author Cas Leentfaar <info@casleentfaar.com>
+ *
+ * @link Official documentation at https://api.slack.com/methods/channels.archive
+ */
+class ReactionsPayload extends AbstractPayload
+{
+    /**
+     * @var string
+     */
+    private $channel;
+
+    /**
+     * @var string
+     */
+    private $timestamp;
+
+    /**
+     * @param string $channelId
+     */
+    public function setChannelId($channelId)
+    {
+        $this->channel = $channelId;
+    }
+
+    /**
+     * @return string
+     */
+    public function getChannelId()
+    {
+        return $this->channel;
+    }
+
+    /**
+     * @return string
+     */
+    public function getTimestamp()
+    {
+        return $this->timestamp;
+    }
+
+    /**
+     * @param string $timestamp
+     */
+    public function setTimestamp($timestamp)
+    {
+        $this->timestamp = $timestamp;
+    }
+
+    /**
+     * @return string
+     */
+    public function getMethod()
+    {
+        return 'reactions.get';
+    }
+}
diff --git a/src/CL/Slack/Payload/ReactionsPayloadResponse.php b/src/CL/Slack/Payload/ReactionsPayloadResponse.php
new file mode 100644
index 00000000..2f63dddd
--- /dev/null
+++ b/src/CL/Slack/Payload/ReactionsPayloadResponse.php
@@ -0,0 +1,63 @@
+<?php
+
+/*
+ * This file is part of the Slack API library.
+ *
+ * (c) Cas Leentfaar <info@casleentfaar.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace CL\Slack\Payload;
+
+/**
+ * @author Cas Leentfaar <info@casleentfaar.com>
+ */
+class ReactionsPayloadResponse extends AbstractPayloadResponse
+{
+    private $message;
+
+    private $channel;
+
+    /**
+     * @return mixed
+     */
+    public function getMessage()
+    {
+        return $this->message;
+    }
+
+    /**
+     * @param mixed $message
+     */
+    public function setMessage($message)
+    {
+        $this->message = $message;
+    }
+
+    /**
+     * @return mixed
+     */
+    public function getChannel()
+    {
+        return $this->channel;
+    }
+
+    /**
+     * @param mixed $channel
+     */
+    public function setChannel($channel)
+    {
+        $this->channel = $channel;
+    }
+
+    public function getReactions()
+    {
+        if (!isset($this->message['reactions'])) {
+            return [];
+        }
+
+        return $this->message['reactions'];
+    }
+}
diff --git a/src/CL/Slack/Resources/config/serializer/CL.Slack.Model.Attachment.yml b/src/CL/Slack/Resources/config/serializer/CL.Slack.Model.Attachment.yml
index 89ffe5a3..c561b41d 100644
--- a/src/CL/Slack/Resources/config/serializer/CL.Slack.Model.Attachment.yml
+++ b/src/CL/Slack/Resources/config/serializer/CL.Slack.Model.Attachment.yml
@@ -1,5 +1,16 @@
 CL\Slack\Model\Attachment:
     properties:
+        titleLink:
+            type: string
+        authorName:
+            type: string
+        authorLink:
+            type: string
+        authorIcon:
+            type: string
+        mrkdwnIn:
+            type: array
+
         title:
             type: string
         fallback:
@@ -12,5 +23,7 @@ CL\Slack\Model\Attachment:
             type: string
         color:
             type: string
+        footer:
+            type: string
         fields:
             type: ArrayCollection<CL\Slack\Model\AttachmentField>
diff --git a/src/CL/Slack/Resources/config/serializer/CL.Slack.Model.File.yml b/src/CL/Slack/Resources/config/serializer/CL.Slack.Model.File.yml
index bf91b456..1e48eb3b 100644
--- a/src/CL/Slack/Resources/config/serializer/CL.Slack.Model.File.yml
+++ b/src/CL/Slack/Resources/config/serializer/CL.Slack.Model.File.yml
@@ -79,6 +79,6 @@ CL\Slack\Model\File:
         groups:
             type: array<string>
         initialComment:
-            type: string
+            type: array
         numStars:
             type: integer
diff --git a/src/CL/Slack/Resources/config/serializer/CL.Slack.Model.SimpleMessage.yml b/src/CL/Slack/Resources/config/serializer/CL.Slack.Model.SimpleMessage.yml
index 3a888918..bf779af9 100644
--- a/src/CL/Slack/Resources/config/serializer/CL.Slack.Model.SimpleMessage.yml
+++ b/src/CL/Slack/Resources/config/serializer/CL.Slack.Model.SimpleMessage.yml
@@ -7,7 +7,7 @@ CL\Slack\Model\SimpleMessage:
         subtype:
             type: string
         channel:
-            type: CL\Slack\Model\SimpleChannel
+            type: string
         user:
             type: string
         username:
diff --git a/src/CL/Slack/Resources/config/serializer/CL.Slack.Payload.ReactionsPayloadResponse.yml b/src/CL/Slack/Resources/config/serializer/CL.Slack.Payload.ReactionsPayloadResponse.yml
new file mode 100644
index 00000000..97b328d6
--- /dev/null
+++ b/src/CL/Slack/Resources/config/serializer/CL.Slack.Payload.ReactionsPayloadResponse.yml
@@ -0,0 +1,6 @@
+CL\Slack\Payload\ReactionsPayloadResponse:
+    properties:
+        channel:
+            type: string
+        message:
+            type: array