diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..54c58d0
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,5 @@
+simplyFavicon 2021.08.18
+ * update license
+
+simplyFavicon 2011.04.08
+ * first version
\ No newline at end of file
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..4c0b9f9
--- /dev/null
+++ b/README.md
@@ -0,0 +1,31 @@
+# README
+
+## WHAT IS simplyFavicon ?
+
+simplyFavicon is a plugin for the open-source 
+web publishing software called Dotclear.
+
+.
+
+## REQUIREMENTS
+
+ simplyFavicon requires: 
+
+  * Administrator permissions
+  * Dotclear 2.18 
+  * A readable public directory.
+
+## USAGE
+
+First install simplyFavicon, manualy from a zip package or from 
+Dotaddict repository. (See Dotclear's documentation to know how do this)
+
+Add un file called ''favicon.xxx'' where xxx could be ico, jpg, png, 
+on your blog public root directory and 
+simplyFavicon add required code to public page to show favicon on browser.
+
+## MORE
+
+ * License : GNU GPL v2
+ * Source & contribution : [GitHub Page](https://github.com/JcDenis/simplyFavicon)
+ * Packages & details:  [Dotaddict Page](https://plugins.dotaddict.org/dc2/details/simplyFavicon)
\ No newline at end of file
diff --git a/_admin.php b/_admin.php
index bfa4d1f..fe9b773 100644
--- a/_admin.php
+++ b/_admin.php
@@ -1,17 +1,18 @@
 <?php
 # -- BEGIN LICENSE BLOCK ----------------------------------
+#
 # This file is part of simplyFavicon, a plugin for Dotclear 2.
 # 
-# Copyright (c) 2009-2011 JC Denis and contributors
-# jcdenis@gdwd.com
+# Copyright (c) 2009-2021 Jean-Christian Denis and contributors
 # 
 # Licensed under the GPL version 2.0 license.
 # A copy of this license is available in LICENSE file or at
 # http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+#
 # -- END LICENSE BLOCK ------------------------------------
 
 if (!defined('DC_CONTEXT_ADMIN')) {
-	return;
+    return;
 }
 
 $core->addBehavior('adminBlogPreferencesForm', ['adminSimplyFavicon', 'adminBlogPreferencesForm']);
@@ -19,21 +20,21 @@ $core->addBehavior('adminBeforeBlogSettingsUpdate', ['adminSimplyFavicon', 'admi
 
 class adminSimplyFavicon
 {
-	public static function adminBlogPreferencesForm($core, $blog_settings)
-	{
-		echo
-		'<div class="fieldset"><h4 id="simply_favicon_params">Favicon</h4>' .
-		'<p><label class="classic">' .
-		form::checkbox('simply_favicon', '1', (boolean) $blog_settings->system->simply_favicon) . 
-		__('Enable "Simply favicon" extension') . '</label></p>' .
-		'<p class="form-note">' .
-		__("You must place an image called favicon.png or .jpg or .ico into your blog's public directory.") .
-		'</p>' .
-		'</div>';
-	}
-	
-	public static function adminBeforeBlogSettingsUpdate($blog_settings)
-	{
-		$blog_settings->system->put('simply_favicon', !empty($_POST['simply_favicon']));
-	}
-}
+    public static function adminBlogPreferencesForm($core, $blog_settings)
+    {
+        echo
+        '<div class="fieldset"><h4 id="simply_favicon_params">Favicon</h4>' .
+        '<p><label class="classic">' .
+        form::checkbox('simply_favicon', '1', (boolean) $blog_settings->system->simply_favicon) . 
+        __('Enable "Simply favicon" extension') . '</label></p>' .
+        '<p class="form-note">' .
+        __("You must place an image called favicon.png or .jpg or .ico into your blog's public directory.") .
+        '</p>' .
+        '</div>';
+    }
+    
+    public static function adminBeforeBlogSettingsUpdate($blog_settings)
+    {
+        $blog_settings->system->put('simply_favicon', !empty($_POST['simply_favicon']));
+    }
+}
\ No newline at end of file
diff --git a/_define.php b/_define.php
index 218d682..5fb087e 100644
--- a/_define.php
+++ b/_define.php
@@ -1,23 +1,24 @@
 <?php
 # -- BEGIN LICENSE BLOCK ----------------------------------
+#
 # This file is part of simplyFavicon, a plugin for Dotclear 2.
 # 
-# Copyright (c) 2009-2011 JC Denis and contributors
-# jcdenis@gdwd.com
+# Copyright (c) 2009-2021 Jean-Christian Denis and contributors
 # 
 # Licensed under the GPL version 2.0 license.
 # A copy of this license is available in LICENSE file or at
 # http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+#
 # -- END LICENSE BLOCK ------------------------------------
 
 if (!defined('DC_RC_PATH')){
-	return;
+    return;
 }
  
 $this->registerModule(
-	/* Name */			"Simply favicon",
-	/* Description*/		"Multi-agents favicon",
-	/* Author */			"JC Denis",
-	/* Version */			'2021.08.16',
-	/* Permissions */		'admin'
-);
+    "Simply favicon",
+    "Multi-agents favicon",
+    "Jean-Christian Denis",
+    '2021.08.18',
+    'admin'
+);
\ No newline at end of file
diff --git a/_prepend.php b/_prepend.php
index f0b9b74..31ae496 100644
--- a/_prepend.php
+++ b/_prepend.php
@@ -1,19 +1,20 @@
 <?php
 # -- BEGIN LICENSE BLOCK ----------------------------------
+#
 # This file is part of simplyFavicon, a plugin for Dotclear 2.
 # 
-# Copyright (c) 2009-2011 JC Denis and contributors
-# jcdenis@gdwd.com
+# Copyright (c) 2009-2021 Jean-Christian Denis and contributors
 # 
 # Licensed under the GPL version 2.0 license.
 # A copy of this license is available in LICENSE file or at
 # http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+#
 # -- END LICENSE BLOCK ------------------------------------
 
 if (!defined('DC_RC_PATH')){
-	return;
+    return;
 }
 
 $__autoload['publicSimplyFavicon'] = dirname(__FILE__) . '/_public.php';
 
-$core->url->register('simplyFavicon', 'favicon', '^favicon.(.*?)$', ['publicSimplyFavicon', 'simplyFaviconUrl']);
+$core->url->register('simplyFavicon', 'favicon', '^favicon.(.*?)$', ['publicSimplyFavicon', 'simplyFaviconUrl']);
\ No newline at end of file
diff --git a/_public.php b/_public.php
index 45677c4..06cd122 100644
--- a/_public.php
+++ b/_public.php
@@ -1,84 +1,85 @@
 <?php
 # -- BEGIN LICENSE BLOCK ----------------------------------
+#
 # This file is part of simplyFavicon, a plugin for Dotclear 2.
 # 
-# Copyright (c) 2009-2011 JC Denis and contributors
-# jcdenis@gdwd.com
+# Copyright (c) 2009-2021 Jean-Christian Denis and contributors
 # 
 # Licensed under the GPL version 2.0 license.
 # A copy of this license is available in LICENSE file or at
 # http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+#
 # -- END LICENSE BLOCK ------------------------------------
 
 if (!defined('DC_RC_PATH')){
-	return;
+    return;
 }
 
-$core->addBehavior('publicHeadContent', ['publicSimplyFavicon','publicHeadContent']);
+$core->addBehavior('publicHeadContent', ['publicSimplyFavicon', 'publicHeadContent']);
 
 class publicSimplyFavicon extends dcUrlHandlers
 {
-	public static $mimetypes = array(
-		'ico' => 'image/x-icon',
-		'png' => 'image/png',
-		'bmp' => 'image/bmp',
-		'gif' => 'image/gif',
-		'jpg' => 'image/jpeg',
-		'mng' => 'video/x-mng'
-	);
-	
-	public static function simplyFaviconUrl($arg)
-	{
-		global $core;
-		
-		$mimetypes = self::$mimetypes;
-		$public_path = path::real(path::fullFromRoot($core->blog->settings->system->public_path, DC_ROOT)) . '/favicon.';
+    public static $mimetypes = array(
+        'ico' => 'image/x-icon',
+        'png' => 'image/png',
+        'bmp' => 'image/bmp',
+        'gif' => 'image/gif',
+        'jpg' => 'image/jpeg',
+        'mng' => 'video/x-mng'
+    );
+    
+    public static function simplyFaviconUrl($arg)
+    {
+        global $core;
+        
+        $mimetypes = self::$mimetypes;
+        $public_path = path::real(path::fullFromRoot($core->blog->settings->system->public_path, DC_ROOT)) . '/favicon.';
 
-		if (!$core->blog->settings->system->simply_favicon 
-		 || empty($arg) 
-		 || !array_key_exists($arg, $mimetypes) 
-		 || file_exists($public_path . 'favicon' . $arg)
-		) {
-			throw new Exception ("Page not found", 404); 
-		}
-		else {
-			header('Content-Type: ' . $mimetypes[$arg] . ';');
-			readfile($public_path . $arg);
-			exit;
-		}
-	}
-	
-	public static function publicHeadContent($core)
-	{
-		if (!$core->blog->settings->system->simply_favicon){
-			return;
-		}
-		
-		$mimetypes = self::$mimetypes;
-		$public_path = path::real(path::fullFromRoot($core->blog->settings->system->public_path, DC_ROOT)) . '/favicon.';
-		$public_url = $core->blog->url.$core->url->getBase('simplyFavicon') . '.';
-		
-		// ico : IE6
-		if (file_exists($public_path . 'ico') && '?' != substr($core->blog->url, -1)) {
-			echo 
-			'<link rel="SHORTCUT ICON" type="image/x-icon" href="' . $public_url . 'ico" />' . "\n";
-		}
-		// png: apple and others
-		if (file_exists($public_path . 'png')) {
-			echo 
-			'<link rel="apple-touch-icon" href="' . $public_url . 'png" />' . "\n" .
-			'<link rel="icon" type="image/png" href="' . $public_url . 'png" />' . "\n";
-		}
-		// all others
-		else {
-			foreach($mimetypes as $ext => $mime)
-			{
-				if (file_exists($public_path . $ext)) {
-					echo
-					'<link rel="icon" type="' . $mime . '" href="' . $public_url . $ext . '" />' . "\n";
-					break;
-				}
-			}
-		}
-	}
-}
+        if (!$core->blog->settings->system->simply_favicon 
+         || empty($arg) 
+         || !array_key_exists($arg, $mimetypes) 
+         || file_exists($public_path . 'favicon' . $arg)
+        ) {
+            throw new Exception ("Page not found", 404); 
+        }
+        else {
+            header('Content-Type: ' . $mimetypes[$arg] . ';');
+            readfile($public_path . $arg);
+            exit;
+        }
+    }
+    
+    public static function publicHeadContent($core)
+    {
+        if (!$core->blog->settings->system->simply_favicon){
+            return;
+        }
+        
+        $mimetypes = self::$mimetypes;
+        $public_path = path::real(path::fullFromRoot($core->blog->settings->system->public_path, DC_ROOT)) . '/favicon.';
+        $public_url = $core->blog->url.$core->url->getBase('simplyFavicon') . '.';
+        
+        // ico : IE6
+        if (file_exists($public_path . 'ico') && '?' != substr($core->blog->url, -1)) {
+            echo 
+            '<link rel="SHORTCUT ICON" type="image/x-icon" href="' . $public_url . 'ico" />' . "\n";
+        }
+        // png: apple and others
+        if (file_exists($public_path . 'png')) {
+            echo 
+            '<link rel="apple-touch-icon" href="' . $public_url . 'png" />' . "\n" .
+            '<link rel="icon" type="image/png" href="' . $public_url . 'png" />' . "\n";
+        }
+        // all others
+        else {
+            foreach($mimetypes as $ext => $mime)
+            {
+                if (file_exists($public_path . $ext)) {
+                    echo
+                    '<link rel="icon" type="' . $mime . '" href="' . $public_url . $ext . '" />' . "\n";
+                    break;
+                }
+            }
+        }
+    }
+}
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