diff --git a/_prepend.php b/_prepend.php
index fea8911..c85bd34 100644
--- a/_prepend.php
+++ b/_prepend.php
@@ -15,27 +15,9 @@ if (!defined('DC_RC_PATH')) {
     return null;
 }
 
-# Check Dotclear version
-if (!method_exists('dcUtils', 'versionsCompare') 
- || dcUtils::versionsCompare(DC_VERSION, '2.18', '<', false)) {
-    return null;
-}
-
 $d = dirname(__FILE__) . '/inc/';
 
 # DB class
-$__autoload['periodical'] = $d . 'class.periodical.php';
+$__autoload['periodical']          = $d . 'class.periodical.php';
 # Admin list and pagers
-$__autoload['adminPeriodicalList'] = $d . 'lib.index.pager.php';
-
-# Add to plugn soCialMe (writer part)
-$__autoload['periodicalSoCialMeWriter'] = $d . 'lib.periodical.socialmewriter.php';
-
-$core->addBehavior(
-    'soCialMeWriterMarker',
-    ['periodicalSoCialMeWriter', 'soCialMeWriterMarker']
-);
-$core->addBehavior(
-    'periodicalAfterPublishedPeriodicalEntry',
-    ['periodicalSoCialMeWriter', 'periodicalAfterPublishedPeriodicalEntry']
-);
\ No newline at end of file
+$__autoload['adminPeriodicalList'] = $d . 'lib.index.pager.php';
\ No newline at end of file
diff --git a/inc/lib.periodical.socialmewriter.php b/inc/lib.periodical.socialmewriter.php
deleted file mode 100644
index 811087e..0000000
--- a/inc/lib.periodical.socialmewriter.php
+++ /dev/null
@@ -1,90 +0,0 @@
-<?php
-/**
- * @brief periodical, a plugin for Dotclear 2
- * 
- * @package Dotclear
- * @subpackage Plugin
- * 
- * @author Jean-Christian Denis and contributors
- * 
- * @copyright Jean-Christian Denis
- * @copyright GPL-2.0 https://www.gnu.org/licenses/gpl-2.0.html
- */
-
-if (!defined('DC_RC_PATH')){
-    return;
-}
-
-# Add ability to send social messages when a feed is update
-class periodicalSoCialMeWriter
-{
-    public static function soCialMeWriterMarker($rs)
-    {
-        $rs['periodicalcreate'] = [
-            'name' => __('New periodical publication'),
-            'description' => __('When an entry is published on a period'),
-            'action' => ['Message', 'Link'],
-            'format' => ['Message'],
-            'wildcards' => ['Message' => ['%posttitle%','%posturl%','%shortposturl%','%postauthor%','%sitetitle%','%siteurl%','%shortsiteurl%']]
-        ];
-    }
-
-    public static function periodicalAfterPublishedPeriodicalEntry($core, $post, $period)
-    {
-        $key = 'periodicalcreate';
-
-        # Is install
-        if (!$core->plugins->moduleExists('soCialMe')) {
-            return;
-        }
-        # Is active
-        if (!$core->blog->settings->soCialMeWriter->active) {
-            return;
-        }
-        # Load services
-        $soCialMeWriter = new soCialMeWriter($core);
-
-        # List of service per action
-        $actions = $soCialMeWriter->getMarker('action');
-
-        # List of format per type
-        $formats = $soCialMeWriter->getMarker('format');
-
-        # prepare data
-        $shortposturl = soCialMeWriter::reduceURL($post->getURL());
-        $shortposturl = $shortposturl ? $shortposturl : $post->getURL();
-
-        $shortsiteurl = soCialMeWriter::reduceURL($core->blog->url);
-        $shortsiteurl = $shortsiteurl ? $shortsiteurl : $core->blog->url;
-
-        # sendMessage
-        if (!empty($formats[$key]['Message']) && !empty($actions[$key]['Message'])) {
-            // parse message
-            $message_txt = str_replace(
-                ['%posttitle%', '%posturl%', '%shortposturl%', '%postauthor%', '%sitetitle%', '%siteurl%', '%shortsiteurl%'],
-                [$post->post_title, $post->getURL(), $shortposturl, $post->getUserCN(), $core->blog->name, $core->blog->url, $shortsiteurl],
-                $formats[$key]['Message']
-            );
-
-            // send message
-            if (!empty($message_txt)) {
-                foreach($actions[$key]['Message'] as $service_id) {
-                    $soCialMeWriter->play($service_id, 'Message', 'Content', $message_txt);
-                }
-            }
-        }
-
-        # sendLink
-        if (!empty($actions[$key]['Link'])) {
-            foreach($actions[$key]['Link'] as $service_id) {
-                $soCialMeWriter->play($service_id, 'Link', 'Content', $post->post_title, $shortposturl);
-            }
-        }
-
-        # sendData
-        // not yet implemented
-
-        #sendArticle
-        // not yet implemented
-    }
-}
\ No newline at end of file