diff --git a/.editorconfig b/.editorconfig
index 79207a4..ceb407d 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -19,4 +19,4 @@ indent_style = space
 indent_size = 2
 
 [{*.txt,wp-config-sample.php}]
-end_of_line = crlf
+end_of_line = lf
diff --git a/README.md b/README.md
index cbb25f2..ba7b6cc 100644
--- a/README.md
+++ b/README.md
@@ -55,6 +55,12 @@ To implement:
 
 Project maintained on github at [pfefferle/wordpress-activitypub](https://github.com/pfefferle/wordpress-activitypub).
 
+### 0.4.0 ###
+
+* added settings to enable/disable hashtag support
+* fixed follower list
+* send activities only for new posts, otherwise send updates
+
 ### 0.3.2 ###
 
 * added "followers" endpoint
diff --git a/activitypub.php b/activitypub.php
index 5ba34e1..aef4845 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: 0.3.2
+ * Version: 0.4.0
  * Author: Matthias Pfefferle
  * Author URI: https://notiz.blog/
  * License: MIT
@@ -70,9 +70,11 @@ function activitypub_init() {
 	add_action( 'admin_init', array( 'Activitypub_Admin', 'register_settings' ) );
 	add_action( 'show_user_profile', array( 'Activitypub_Admin', 'add_fediverse_profile' ) );
 
-	require_once dirname( __FILE__ ) . '/includes/class-activitypub-hashtag.php';
-	add_filter( 'wp_insert_post', array( 'Activitypub_Hashtag', 'insert_post' ), 99, 2 );
-	add_filter( 'the_content', array( 'Activitypub_Hashtag', 'the_content' ), 99, 2 );
+	if ( '1' === get_option( 'activitypub_use_hashtags', '1' ) ) {
+		require_once dirname( __FILE__ ) . '/includes/class-activitypub-hashtag.php';
+		add_filter( 'wp_insert_post', array( 'Activitypub_Hashtag', 'insert_post' ), 99, 2 );
+		add_filter( 'the_content', array( 'Activitypub_Hashtag', 'the_content' ), 99, 2 );
+	}
 }
 add_action( 'plugins_loaded', 'activitypub_init' );
 
diff --git a/includes/class-activitypub-admin.php b/includes/class-activitypub-admin.php
index 499176c..1231920 100644
--- a/includes/class-activitypub-admin.php
+++ b/includes/class-activitypub-admin.php
@@ -60,6 +60,13 @@ class Activitypub_Admin {
 				'default' => 0,
 			)
 		);
+		register_setting(
+			'activitypub', 'activitypub_use_hashtags', array(
+				'type' => 'boolean',
+				'description' => __( 'Use the Shortlink instead of the permalink', 'activitypub' ),
+				'default' => 0,
+			)
+		);
 	}
 
 	public static function add_help_tab() {
diff --git a/languages/activitypub.pot b/languages/activitypub.pot
index a536a12..4a41ab4 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 0.3.2\n"
+"Project-Id-Version: ActivityPub 0.4.0\n"
 "Report-Msgid-Bugs-To: https://wordpress.org/support/plugin/activitypub\n"
-"POT-Creation-Date: 2019-02-04 12:33:44+00:00\n"
+"POT-Creation-Date: 2019-02-17 20:26:22+00:00\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=utf-8\n"
 "Content-Transfer-Encoding: 8bit\n"
@@ -21,15 +21,16 @@ msgstr ""
 msgid "The Activity-Object-Type"
 msgstr ""
 
-#: includes/class-activitypub-admin.php:59 templates/settings-page.php:34
+#: includes/class-activitypub-admin.php:59
+#: includes/class-activitypub-admin.php:66 templates/settings-page.php:33
 msgid "Use the Shortlink instead of the permalink"
 msgstr ""
 
-#: includes/class-activitypub-admin.php:69
+#: includes/class-activitypub-admin.php:76
 msgid "Overview"
 msgstr ""
 
-#: includes/class-activitypub-admin.php:71
+#: includes/class-activitypub-admin.php:78
 msgid ""
 "ActivityPub is a decentralized social networking protocol based on the "
 "ActivityStreams 2.0 data format. ActivityPub is an official W3C recommended "
@@ -39,33 +40,33 @@ msgid ""
 "subscribing to content."
 msgstr ""
 
-#: includes/class-activitypub-admin.php:76
+#: includes/class-activitypub-admin.php:83
 msgid "For more information:"
 msgstr ""
 
-#: includes/class-activitypub-admin.php:77
+#: includes/class-activitypub-admin.php:84
 msgid "<a href=\"https://activitypub.rocks/\">Test Suite</a>"
 msgstr ""
 
-#: includes/class-activitypub-admin.php:78
+#: includes/class-activitypub-admin.php:85
 msgid "<a href=\"https://www.w3.org/TR/activitypub/\">W3C Spec</a>"
 msgstr ""
 
-#: includes/class-activitypub-admin.php:79
+#: includes/class-activitypub-admin.php:86
 msgid ""
 "<a href=\"https://github.com/pfefferle/wordpress-activitypub/issues\">Give "
 "us feedback</a>"
 msgstr ""
 
-#: includes/class-activitypub-admin.php:81
+#: includes/class-activitypub-admin.php:88
 msgid "<a href=\"https://notiz.blog/donate\">Donate</a>"
 msgstr ""
 
-#: includes/class-activitypub-admin.php:87
+#: includes/class-activitypub-admin.php:94
 msgid "Fediverse"
 msgstr ""
 
-#: includes/class-db-activitypub-followers.php:23
+#: includes/class-db-activitypub-followers.php:46
 msgid "Unknown Actor schema"
 msgstr ""
 
@@ -128,7 +129,7 @@ msgstr ""
 msgid "Blog"
 msgstr ""
 
-#: templates/json-author.php:59 templates/settings-page.php:60
+#: templates/json-author.php:59 templates/settings-page.php:79
 msgid "Profile"
 msgstr ""
 
@@ -179,57 +180,75 @@ msgstr ""
 msgid "Backlink"
 msgstr ""
 
-#: templates/settings-page.php:41
+#: templates/settings-page.php:39
 msgid "Activtity-Object-Type"
 msgstr ""
 
-#: templates/settings-page.php:45
+#: templates/settings-page.php:43
 msgid "Note (default)"
 msgstr ""
 
-#: templates/settings-page.php:45
+#: templates/settings-page.php:43
 msgid "Should work with most plattforms."
 msgstr ""
 
-#: templates/settings-page.php:48
+#: templates/settings-page.php:46
 msgid "Article"
 msgstr ""
 
-#: templates/settings-page.php:48
+#: templates/settings-page.php:46
 msgid ""
 "The presentation of the \"Article\" might change on different plattforms. "
 "Mastodon for example shows the \"Article\" type as a simple link."
 msgstr ""
 
-#: templates/settings-page.php:51
+#: templates/settings-page.php:49
 msgid "WordPress Post-Format"
 msgstr ""
 
-#: templates/settings-page.php:51
+#: templates/settings-page.php:49
 msgid "Maps the WordPress Post-Format to the ActivityPub Object Type."
 msgstr ""
 
-#: templates/settings-page.php:62
-msgid "All profile related settings."
+#: templates/settings-page.php:58
+msgid "Hashtag"
 msgstr ""
 
-#: templates/settings-page.php:68
-msgid "Followers"
+#: templates/settings-page.php:60
+msgid "All #tag related settings"
+msgstr ""
+
+#: templates/settings-page.php:66
+msgid "Support Hashtags"
 msgstr ""
 
 #: templates/settings-page.php:70
+msgid ""
+"Add hashtags in the content as native tags and replace the "
+"<code>#tag</code> with the tag-link."
+msgstr ""
+
+#: templates/settings-page.php:81
+msgid "All profile related settings."
+msgstr ""
+
+#: templates/settings-page.php:87
+msgid "Followers"
+msgstr ""
+
+#: templates/settings-page.php:89
 msgid "All follower related settings."
 msgstr ""
 
-#: templates/settings-page.php:76
+#: templates/settings-page.php:95
 msgid "List of followers"
 msgstr ""
 
-#: templates/settings-page.php:86
+#: templates/settings-page.php:105
 msgid "No followers yet"
 msgstr ""
 
-#: templates/settings-page.php:101
+#: templates/settings-page.php:120
 msgid ""
 "If you like this plugin, what about a small <a "
 "href=\"https://notiz.blog/donate\">donation</a>?"
diff --git a/readme.txt b/readme.txt
index 42760d8..4d781aa 100644
--- a/readme.txt
+++ b/readme.txt
@@ -55,6 +55,12 @@ To implement:
 
 Project maintained on github at [pfefferle/wordpress-activitypub](https://github.com/pfefferle/wordpress-activitypub).
 
+= 0.4.0 =
+
+* added settings to enable/disable hashtag support
+* fixed follower list
+* send activities only for new posts, otherwise send updates
+
 = 0.3.2 =
 
 * added "followers" endpoint
diff --git a/templates/settings-page.php b/templates/settings-page.php
index 02ade97..03d165a 100644
--- a/templates/settings-page.php
+++ b/templates/settings-page.php
@@ -30,10 +30,8 @@
 						<?php esc_html_e( 'Backlink', 'activitypub' ); ?>
 					</th>
 					<td>
-						<p>
-							<label><input type="checkbox" name="activitypub_use_shortlink" id="activitypub_use_shortlink" value="1" <?php echo checked( '1', get_option( 'activitypub_use_shortlink', '0' ) ); ?> /> <?php esc_html_e( 'Use the Shortlink instead of the permalink', 'activitypub' ); ?></label>
-							<p class="description"><?php printf( esc_html( 'I can recommend %sHum%s, to prettify the Shortlinks', 'activitypub' ), '<a href="https://wordpress.org/plugins/hum/" target="_blank">', '</a>' ); ?></p>
-						</p>
+						<p><label><input type="checkbox" name="activitypub_use_shortlink" id="activitypub_use_shortlink" value="1" <?php echo checked( '1', get_option( 'activitypub_use_shortlink', '0' ) ); ?> /> <?php esc_html_e( 'Use the Shortlink instead of the permalink', 'activitypub' ); ?></label></p>
+						<p class="description"><?php printf( esc_html( 'I can recommend %sHum%s, to prettify the Shortlinks', 'activitypub' ), '<a href="https://wordpress.org/plugins/hum/" target="_blank">', '</a>' ); ?></p>
 					</td>
 				</tr>
 				<tr>
@@ -57,6 +55,27 @@
 
 		<?php do_settings_fields( 'activitypub', 'activity' ); ?>
 
+		<h2><?php esc_html_e( 'Hashtag', 'activitypub' ); ?></h2>
+
+		<p><?php esc_html_e( 'All #tag related settings', 'activitypub' ); ?></p>
+
+		<table class="form-table">
+			<tbody>
+				<tr>
+					<th scope="row">
+						<label><?php esc_html_e( 'Support Hashtags', 'activitypub' ); ?></label>
+					</th>
+					<td>
+						<p>
+							<label><input type="checkbox" name="activitypub_use_hashtags" id="activitypub_use_hashtags" value="1" <?php echo checked( '1', get_option( 'activitypub_use_hashtags', '1' ) ); ?> /> <?php _e( 'Add hashtags in the content as native tags and replace the <code>#tag</code> with the tag-link.', 'activitypub' ); ?></label>
+						</p>
+					</td>
+				</tr>
+			</tbody>
+		</table>
+
+		<?php do_settings_fields( 'activitypub', 'hashtag' ); ?>
+
 		<h2><?php esc_html_e( 'Profile', 'activitypub' ); ?></h2>
 
 		<p><?php esc_html_e( 'All profile related settings.', 'activitypub' ); ?></p>