diff --git a/README.txt b/README.txt
index ff2482a..93cda19 100644
--- a/README.txt
+++ b/README.txt
@@ -3,7 +3,7 @@ Contributors: sailthru-wp
 Tags: personalization, email,
 Requires at least: 5.5
 Tested up to: 5.7
-Stable tag: 4.2.0
+Stable tag: 4.3.0
 
 Provides an integration with Sailthru
 
diff --git a/changelog.md b/changelog.md
index 086d335..ceeb00d 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,5 +1,8 @@
 # Changelog
 
+## v4.3.0 (2021-09-01)
+Added filter for content vars
+
 ## v4.2.0 (2021-07-06)
 Added post object to sailthru_horizon_meta_tags filter
 
diff --git a/classes/class-sailthru-content.php b/classes/class-sailthru-content.php
index 76907bf..681ff1c 100644
--- a/classes/class-sailthru-content.php
+++ b/classes/class-sailthru-content.php
@@ -340,7 +340,7 @@ function generate_payload( $post, $post_id ) {
 
 		// Add the vars
 		$data['vars'] = $this->generate_vars( $post->ID, $post );
-
+		$data['vars'] = apply_filters( 'sailthru_content_vars', $data['vars'], $post);
 
 		return $data;
 	}
diff --git a/plugin.php b/plugin.php
index 66d7f68..919cd1c 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:            4.2.0
+Version:            4.3.0
 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', '4.2.0' );
+	define( 'SAILTHRU_PLUGIN_VERSION', '4.3.0' );
 }
 
 if ( ! defined( 'SAILTHRU_PLUGIN_PATH' ) ) {