diff --git a/README.md b/README.md
index 4bdf6de..cbf10ee 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@
 **Tags:** OStatus, fediverse, activitypub, activitystream  
 **Requires at least:** 4.7  
 **Tested up to:** 5.1  
-**Stable tag:** 0.5.0  
+**Stable tag:** 0.5.1  
 **Requires PHP:** 5.6  
 **License:** MIT  
 **License URI:** http://opensource.org/licenses/MIT  
@@ -55,6 +55,10 @@ To implement:
 
 Project maintained on github at [pfefferle/wordpress-activitypub](https://github.com/pfefferle/wordpress-activitypub).
 
+### 0.5.1 ###
+
+* fixed name-collision that cases an invenate loop
+
 ### 0.5.0 ###
 
 * complete refactoring
diff --git a/activitypub.php b/activitypub.php
index ffaaa38..951049f 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: 0.5.0
+ * Version: 0.5.1
  * Author: Matthias Pfefferle
  * Author URI: https://notiz.blog/
  * License: MIT
@@ -78,7 +78,7 @@ add_action( 'init', '\Activitypub\add_rewrite_rules', 1 );
  */
 function flush_rewrite_rules() {
 	\Activitypub\add_rewrite_rules();
-	flush_rewrite_rules();
+	\flush_rewrite_rules();
 }
 register_activation_hook( __FILE__, '\Activitypub\flush_rewrite_rules' );
 register_deactivation_hook( __FILE__, '\flush_rewrite_rules' );
diff --git a/languages/activitypub.pot b/languages/activitypub.pot
index 194011e..13ac072 100644
--- a/languages/activitypub.pot
+++ b/languages/activitypub.pot
@@ -2,9 +2,9 @@
 # This file is distributed under the MIT.
 msgid ""
 msgstr ""
-"Project-Id-Version: ActivityPub 0.5.0\n"
+"Project-Id-Version: ActivityPub 0.5.1\n"
 "Report-Msgid-Bugs-To: https://wordpress.org/support/plugin/activitypub\n"
-"POT-Creation-Date: 2019-02-28 18:31:27+00:00\n"
+"POT-Creation-Date: 2019-03-02 19:31:03+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 ae0f3e6..2a4da56 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: 5.1
-Stable tag: 0.5.0
+Stable tag: 0.5.1
 Requires PHP: 5.6
 License: MIT
 License URI: http://opensource.org/licenses/MIT
@@ -55,6 +55,10 @@ To implement:
 
 Project maintained on github at [pfefferle/wordpress-activitypub](https://github.com/pfefferle/wordpress-activitypub).
 
+= 0.5.1 =
+
+* fixed name-collision that cases an invenate loop
+
 = 0.5.0 =
 
 * complete refactoring