diff --git a/lib/timber-image.php b/lib/timber-image.php
index <HASH>..<HASH> 100644
--- a/lib/timber-image.php
+++ b/lib/timber-image.php
@@ -25,7 +25,7 @@ class TimberImage extends TimberPost implements TimberCoreInterface {
 	}
 
 	/**
-	 * @return string
+	 * @return string|null
 	 */
 	function __toString() {
 		if ($this->get_src()) {
@@ -56,7 +56,7 @@ class TimberImage extends TimberPost implements TimberCoreInterface {
 	}
 
 	/**
-	 * @param string $dim
+	 * @param string|null $dim
 	 * @return array|int
 	 */
 	function get_dimensions_loaded($dim) {
diff --git a/readme.txt b/readme.txt
index <HASH>..<HASH> 100644
--- a/readme.txt
+++ b/readme.txt
@@ -2,7 +2,7 @@
 Contributors: jarednova
 Tags: template engine, templates, twig
 Requires at least: 3.7
-Stable tag: 0.21.3
+Stable tag: 0.21.4
 Tested up to: 4.1
 PHP version: 5.3.0 or greater
 License: GPLv2 or later
diff --git a/timber.php b/timber.php
index <HASH>..<HASH> 100644
--- a/timber.php
+++ b/timber.php
@@ -4,7 +4,7 @@ Plugin Name: Timber
 Plugin URI: http://timber.upstatement.com
 Description: The WordPress Timber Library allows you to write themes using the power Twig templates
 Author: Jared Novack + Upstatement
-Version: 0.21.3
+Version: 0.21.4
 Author URI: http://upstatement.com/
 */
Update version numbers, changelog and some doc issues