diff --git a/CHANGELOG.md b/CHANGELOG.md
index 93f6fb1..3d609b8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,5 @@
-2021.10.23
+2021.10.30
+- required Dotclear 2.20
 - add user pref filters for periods list
 - add user pref columns for periods list
 - add period columns to posts list and user pref
diff --git a/README.md b/README.md
index ac2cc70..a19ab78 100644
--- a/README.md
+++ b/README.md
@@ -3,13 +3,13 @@
 [![Release](https://img.shields.io/github/v/release/JcDenis/periodical)](https://github.com/JcDenis/periodical/releases)
 [![Date](https://img.shields.io/github/release-date/JcDenis/periodical)](https://github.com/JcDenis/periodical/releases)
 [![Issues](https://img.shields.io/github/issues/JcDenis/periodical)](https://github.com/JcDenis/periodical/issues)
-[![Dotclear](https://img.shields.io/badge/dotclear-v2.19-blue.svg)](https://fr.dotclear.org/download)
+[![Dotclear](https://img.shields.io/badge/dotclear-v2.20-blue.svg)](https://fr.dotclear.org/download)
 [![Dotaddict](https://img.shields.io/badge/dotaddict-official-green.svg)](https://plugins.dotaddict.org/dc2/details/periodical)
 [![License](https://img.shields.io/github/license/JcDenis/periodical)](https://github.com/JcDenis/periodical/blob/master/LICENSE)
 
 ## WHAT IS PERIODICAL ?
 
-"Periodical" is a plugin for the open-source 
+_Periodical_ is a plugin for the open-source 
 web publishing software called Dotclear.
 
 You can manage and publish automatically lists of posts 
@@ -18,7 +18,7 @@ and they will be publish ones after the others every week.
 
 ## REQUIREMENTS
 
- periodical requires: 
+ _periodical_ requires: 
 
   * admin permissions to configure plugin
   * usage,contentadmin permissions to link feeds
@@ -30,15 +30,15 @@ This plugin creates a new table on Dotclear database !
 
 ## USAGE
 
-First install periodical, manualy from a zip package or from 
+First install _periodical_, manualy from a zip package or from 
 Dotaddict repository. (See Dotclear's documentation to know how do this)
 
 Main settings are accessible from blog preference page.
 
-When enabled you have a menu in main sidebar menu called "Periodical" 
+When enabled you have a menu in main sidebar menu called _Periodical_ 
 under "Plugins" group, follow it to manage periods.
 
-When you edit a post you have a new sidebar option called "Periodical"
+When you edit a post you have a new sidebar option called _Periodical_
 to link this post to a period.
 
 You can also add or remove period to multiple posts from posts actions page.
diff --git a/_admin.php b/_admin.php
index 7183e6a..85c0675 100644
--- a/_admin.php
+++ b/_admin.php
@@ -212,7 +212,6 @@ class adminPeriodical
         }
     }
 
-
     /**
      * Add columns period to posts list values.
      *
diff --git a/_define.php b/_define.php
index aa04c06..7f9e2c5 100644
--- a/_define.php
+++ b/_define.php
@@ -19,7 +19,7 @@ $this->registerModule(
     'Periodical',
     'Published periodically entries',
     'Jean-Christian Denis and contributors',
-    '2021.10.23',
+    '2021.10.30',
     [
         'requires'    => [['core', '2.20']],
         'permissions' => 'usage,contentadmin',
diff --git a/dcstore.xml b/dcstore.xml
index f164539..22a641a 100644
--- a/dcstore.xml
+++ b/dcstore.xml
@@ -1,10 +1,11 @@
 <modules xmlns:da="http://dotaddict.org/da/">
 <module id="periodical">
-<name>Publications périodiques</name>
-<version>2021.09.02</version>
+<name>Periodical</name>
+<version>2021.10.30</version>
 <author>Jean-Christian Denis and contributors</author>
 <desc>Published periodically entries</desc>
-<file>https://github.com/JcDenis/periodical/releases/download/v2021.09.02/plugin-periodical.zip</file>
+<file>https://github.com/JcDenis/periodical/releases/download/v2021.10.30/plugin-periodical.zip</file>
+<da:dcmin>2.20</da:dcmin>
 <da:details>https://plugins.dotaddict.org/dc2/details/periodical</da:details>
 <da:support>https://github.com/JcDenis/periodical</da:support>
 </module>