diff --git a/Changelog.md b/Changelog.md
index 9dfe013..d75cfec 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -1,5 +1,10 @@
 # Changelog
 
+##### v2.2.1
+* merge [pull requests #95](https://github.com/jjgrainger/PostTypes/pull/95): Update tests
+* merge [pull requests #93](https://github.com/jjgrainger/PostTypes/pull/93): Fix empty array if taxonomy query var is null
+* merge [pull requests #88](https://github.com/jjgrainger/PostTypes/pull/88): Fix docblock definition
+
 ##### v2.2
 * merge [pull requests #81](https://github.com/jjgrainger/PostTypes/pull/81): Fix Taxonomy dropdown filter
 * merge [pull requests #80](https://github.com/jjgrainger/PostTypes/pull/80): Fix Modify Existing Objects
diff --git a/README.md b/README.md
index 4cc70a6..782016a 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# PostTypes v2.2
+# PostTypes v2.2.1
 
 [![tests](https://github.com/jjgrainger/PostTypes/actions/workflows/tests.yml/badge.svg)](https://github.com/jjgrainger/PostTypes/actions/workflows/tests.yml) [![codecov](https://codecov.io/gh/jjgrainger/PostTypes/branch/master/graph/badge.svg?token=SGrK2xDF46)](https://codecov.io/gh/jjgrainger/PostTypes) [![Latest Stable Version](https://flat.badgen.net/github/release/jjgrainger/PostTypes/stable)](https://packagist.org/packages/jjgrainger/posttypes) [![Total Downloads](https://flat.badgen.net/packagist/dt/jjgrainger/PostTypes)](https://packagist.org/packages/jjgrainger/posttypes) [![License](https://flat.badgen.net/github/license/jjgrainger/PostTypes)](https://packagist.org/packages/jjgrainger/posttypes)
 
diff --git a/docs/SUMMARY.md b/docs/SUMMARY.md
index 9fdda10..0ce1fb5 100644
--- a/docs/SUMMARY.md
+++ b/docs/SUMMARY.md
@@ -1,6 +1,6 @@
 # Table of Contents
 
-* [PostTypes v2.2](../README.md)
+* [PostTypes v2.2.1](../README.md)
 * [Getting Started](Getting-started.md)
 * [PostTypes](post-types/README.md)
     * [Create a Post Type](post-types/Create-a-post-type.md)
diff --git a/src/Columns.php b/src/Columns.php
index 3040add..14ac23d 100644
--- a/src/Columns.php
+++ b/src/Columns.php
@@ -10,7 +10,7 @@
  * @link    https://github.com/jjgrainger/PostTypes/
  * @author  jjgrainger
  * @link    https://jjgrainger.co.uk
- * @version 2.0
+ * @version 2.2.1
  * @license https://opensource.org/licenses/mit-license.html MIT License
  */
 class Columns
diff --git a/src/PostType.php b/src/PostType.php
index 4df37ef..1ba321d 100644
--- a/src/PostType.php
+++ b/src/PostType.php
@@ -12,7 +12,7 @@
  * @link    https://github.com/jjgrainger/PostTypes/
  * @author  jjgrainger
  * @link    https://jjgrainger.co.uk
- * @version 2.0
+ * @version 2.2.1
  * @license https://opensource.org/licenses/mit-license.html MIT License
  */
 class PostType
diff --git a/src/Taxonomy.php b/src/Taxonomy.php
index a820304..1e27f74 100644
--- a/src/Taxonomy.php
+++ b/src/Taxonomy.php
@@ -12,7 +12,7 @@
  * @link    https://github.com/jjgrainger/PostTypes/
  * @author  jjgrainger
  * @link    https://jjgrainger.co.uk
- * @version 2.0
+ * @version 2.2.1
  * @license https://opensource.org/licenses/mit-license.html MIT License
  */
 class Taxonomy