diff --git a/README.txt b/README.txt
index f746947..1333a6c 100755
--- a/README.txt
+++ b/README.txt
@@ -3,7 +3,7 @@ Contributors: sailthru-wp
 Tags: personalization, email,
 Requires at least: 5.5
 Tested up to: 5.5.1
-Stable tag: 4.0.0
+Stable tag: 4.0.1
 
 Provides an integration with Sailthru
 
diff --git a/changelog.md b/changelog.md
index 7d9e835..5df3bb5 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,9 +1,15 @@
 # Changelog
 
+## v4.0.1 (2020-12-03)
+Fixed warning where post_type not set properly
+
 ## v4.0.0 (2020-10-14)
 Supports Wordpress version 5.5.
 This version isn't backwards compatible with older Wordpress versions.
 
+## v3.6.2 (2020-12-03)
+Fixed warning where post_type not set properly
+
 ## v3.6.1 (2020-10-14)
 Fixed bug where double opt-in option adds users to list immediately
 
diff --git a/classes/class-sailthru-content.php b/classes/class-sailthru-content.php
index a44dd18..a4d59b5 100644
--- a/classes/class-sailthru-content.php
+++ b/classes/class-sailthru-content.php
@@ -291,15 +291,18 @@ function generate_payload( $post, $post_id ) {
 		$url = get_permalink( $post->ID );
 		$url_with_correct_protocol = set_url_scheme( $url );
 
-		$data = [
-			'url' => $url_with_correct_protocol,
-			'title' => $post->post_title,
-			'author' => get_the_author_meta( 'display_name', $post->post_author ),
-			'date' => $post->post_date,
-			'vars'['post_type'] => $post->post_type,
-			'spider' => $spider_value == "false" ? 0 : 1,
-			'description' => $post->post_excerpt
-		];
+		$data = array(
+			'url'         => $url_with_correct_protocol,
+			'title'       => $post->post_title,
+			'author'      => get_the_author_meta( 'display_name', $post->post_author ),
+			'date'        => $post->post_date,
+			'vars'        => array(
+				'post_type' => $post->post_type,
+			),
+			'spider'      => "false" == $spider_value ? 0 : 1,
+			'description' => $post->post_excerpt,
+		);
+
 		if ( empty( $post->post_excerpt ) ) {
 			$data['description'] = wp_trim_words( $post->post_content, 250, '' );
 		}
diff --git a/plugin.php b/plugin.php
index 3608180..c6901b5 100644
--- a/plugin.php
+++ b/plugin.php
@@ -3,7 +3,7 @@
 Plugin Name:        Sailthru for WordPress
 Plugin URI:         http://sailthru.com/
 Description:        Add the power of Sailthru to your WordPress set up.
-Version:            4.0.0
+Version:            4.0.1
 Requires at least:  5.5
 Author:             Sailthru
 Author URI:         http://sailthru.com
@@ -36,7 +36,7 @@
  * @var   const    $version    The current version of the plugin.
  */
 if ( ! defined( 'SAILTHRU_PLUGIN_VERSION' ) ) {
-	define( 'SAILTHRU_PLUGIN_VERSION', '4.0.0' );
+	define( 'SAILTHRU_PLUGIN_VERSION', '4.0.1' );
 }
 
 if ( ! defined( 'SAILTHRU_PLUGIN_PATH' ) ) {