diff --git a/README.md b/README.md
index a8a8001..9de8b8f 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@
 **Tags:** OStatus, fediverse, activitypub, activitystream  
 **Requires at least:** 4.7  
 **Tested up to:** 6.1  
-**Stable tag:** 0.16.1  
+**Stable tag:** 0.16.2  
 **Requires PHP:** 5.6  
 **License:** MIT  
 **License URI:** http://opensource.org/licenses/MIT  
@@ -88,6 +88,10 @@ Where 'blog' is the path to the subdirectory at which your blog resides.
 
 Project maintained on GitHub at [pfefferle/wordpress-activitypub](https://github.com/pfefferle/wordpress-activitypub).
 
+### 0.16.2 ###
+
+* Fix fatal error in outbox
+
 ### 0.16.1 ###
 
 * Fix "update and create, posts appear blank on Mastodon" issue
diff --git a/activitypub.php b/activitypub.php
index b659520..d30bf3f 100644
--- a/activitypub.php
+++ b/activitypub.php
@@ -3,7 +3,7 @@
  * Plugin Name: ActivityPub
  * Plugin URI: https://github.com/pfefferle/wordpress-activitypub/
  * Description: The ActivityPub protocol is a decentralized social networking protocol based upon the ActivityStreams 2.0 data format.
- * Version: 0.16.1
+ * Version: 0.16.2
  * Author: Matthias Pfefferle
  * Author URI: https://notiz.blog/
  * License: MIT
diff --git a/includes/rest/class-outbox.php b/includes/rest/class-outbox.php
index 7eec5ac..615f06b 100644
--- a/includes/rest/class-outbox.php
+++ b/includes/rest/class-outbox.php
@@ -103,7 +103,7 @@ class Outbox {
 			foreach ( $posts as $post ) {
 				$activitypub_post = new \Activitypub\Model\Post( $post );
 				$activitypub_activity = new \Activitypub\Model\Activity( 'Create', \Activitypub\Model\Activity::TYPE_NONE );
-				$activitypub_activity->from_post( $activitypub_post->to_array() );
+				$activitypub_activity->from_post( $activitypub_post );
 				$json->orderedItems[] = $activitypub_activity->to_array(); // phpcs:ignore
 			}
 		}
diff --git a/readme.txt b/readme.txt
index 4e729ef..ad6ad3d 100644
--- a/readme.txt
+++ b/readme.txt
@@ -4,7 +4,7 @@ Donate link: https://notiz.blog/donate/
 Tags: OStatus, fediverse, activitypub, activitystream
 Requires at least: 4.7
 Tested up to: 6.1
-Stable tag: 0.16.1
+Stable tag: 0.16.2
 Requires PHP: 5.6
 License: MIT
 License URI: http://opensource.org/licenses/MIT
@@ -88,6 +88,10 @@ Where 'blog' is the path to the subdirectory at which your blog resides.
 
 Project maintained on GitHub at [pfefferle/wordpress-activitypub](https://github.com/pfefferle/wordpress-activitypub).
 
+= 0.16.2 =
+
+* Fix fatal error in outbox
+
 = 0.16.1 =
 
 * Fix "update and create, posts appear blank on Mastodon" issue