diff --git a/README.md b/README.md
index 1fee133..0d68481 100644
--- a/README.md
+++ b/README.md
@@ -84,6 +84,10 @@ 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).
 
+### 0.8.3 ###
+
+* fixed accept header bug
+
 ### 0.8.2 ###
 
 * add all required accept header
diff --git a/activitypub.php b/activitypub.php
index 57e34b8..b9e84b6 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: 0.8.2
+ * Version: 0.8.3
  * Author: Matthias Pfefferle
  * Author URI: https://notiz.blog/
  * License: MIT
@@ -64,8 +64,8 @@ function init() {
 	require_once dirname( __FILE__ ) . '/includes/class-debug.php';
 	\Activitypub\Debug::init();
 
-	#require_once dirname( __FILE__ ) . '/includes/class-health-check.php';
-	#\Activitypub\Health_Check::init();
+	require_once dirname( __FILE__ ) . '/includes/class-health-check.php';
+	\Activitypub\Health_Check::init();
 }
 add_action( 'plugins_loaded', '\Activitypub\init' );
 
diff --git a/includes/class-activitypub.php b/includes/class-activitypub.php
index c6ffa04..6097265 100644
--- a/includes/class-activitypub.php
+++ b/includes/class-activitypub.php
@@ -24,6 +24,8 @@ class Activitypub {
 		}
 
 		\add_action( 'transition_post_status', array( '\Activitypub\Activitypub', 'schedule_post_activity' ), 10, 3 );
+
+		\add_action( 'trash_post', array( '\Activitypub\Activitypub', 'schedule_delete_activity' ), 10 );
 	}
 
 	/**
@@ -60,22 +62,22 @@ class Activitypub {
 			stristr( $accept_header, 'application/activity+json' ) ||
 			stristr( $accept_header, 'application/ld+json' )
 		) {
-			return $template;
+			return $json_template;
 		}
 
 		// accept header as an array
 		$accept = \explode( ',', trim( $accept_header ) );
 
 		if (
-			! \in_array( 'application/ld+json; profile="https://www.w3.org/ns/activitystreams"', $accept, true ) &&
-			! \in_array( 'application/activity+json', $accept, true ) &&
-			! \in_array( 'application/ld+json', $accept, true ) &&
-			! \in_array( 'application/json', $accept, true )
+			\in_array( 'application/ld+json; profile="https://www.w3.org/ns/activitystreams"', $accept, true ) ||
+			\in_array( 'application/activity+json', $accept, true ) ||
+			\in_array( 'application/ld+json', $accept, true ) ||
+			\in_array( 'application/json', $accept, true )
 		) {
-			return $template;
+			return $json_template;
 		}
 
-		return $json_template;
+		return $template;
 	}
 
 	/**
@@ -113,9 +115,11 @@ class Activitypub {
 		}
 
 		if ( 'publish' === $new_status && 'publish' !== $old_status ) {
-			\wp_schedule_single_event( time() + \wp_rand( 0, 120 ), 'activitypub_send_post_activity', array( $post->ID ) );
+			\wp_schedule_single_event( time(), 'activitypub_send_post_activity', array( $post->ID ) );
 		} elseif ( 'publish' === $new_status ) {
-			\wp_schedule_single_event( time() + \wp_rand( 0, 120 ), 'activitypub_send_update_activity', array( $post->ID ) );
+			\wp_schedule_single_event( time(), 'activitypub_send_update_activity', array( $post->ID ) );
+		} elseif ( 'trash' === $new_status ) {
+			\wp_schedule_single_event( time(), 'activitypub_send_delete_activity', array( get_permalink( $post ) ) );
 		}
 	}
 
diff --git a/languages/activitypub.pot b/languages/activitypub.pot
index ef74201..2387722 100644
--- a/languages/activitypub.pot
+++ b/languages/activitypub.pot
@@ -2,10 +2,10 @@
 # This file is distributed under the MIT.
 msgid ""
 msgstr ""
-"Project-Id-Version: ActivityPub 0.8.2\n"
+"Project-Id-Version: ActivityPub 0.8.3\n"
 "Report-Msgid-Bugs-To: "
 "https://wordpress.org/support/plugin/wordpress-activitypub\n"
-"POT-Creation-Date: 2019-09-29 18:04:39+00:00\n"
+"POT-Creation-Date: 2019-09-30 05:58:15+00:00\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=utf-8\n"
 "Content-Transfer-Encoding: 8bit\n"
diff --git a/readme.txt b/readme.txt
index f6f3449..eddf3d7 100644
--- a/readme.txt
+++ b/readme.txt
@@ -84,6 +84,10 @@ 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).
 
+= 0.8.3 =
+
+* fixed accept header bug
+
 = 0.8.2 =
 
 * add all required accept header