diff --git a/src/Jirafeau/a.php b/src/Jirafeau/a.php
index 75570c3..316023e 100644
--- a/src/Jirafeau/a.php
+++ b/src/Jirafeau/a.php
@@ -2,6 +2,7 @@
 /*
  *  Kaz addon (see https://git.kaz.bzh/KAZ/depollueur for information)
  *  create un archive for a set of file or update file deadline
+ *  version : 2.21 (2024-06-04)
 
  a.php?r=email => track
  a.php?p=email => period
@@ -31,6 +32,8 @@ define ('VAR_PERIOD', $cfg ['var_root'].'period/');
 define ('VAR_LANG', $cfg ['var_root'].'lang/');
 define ('VAR_FAKE', $cfg ['var_root'].'fake/');
 define ('VAR_ADMIN', $cfg ['var_root'].'admin/');
+define ('VAR_CONFIG', $cfg ['var_root'].'config/');
+define ('FILE_CONFIG', VAR_CONFIG.'default.php');
 
 $domain="kaz.local";
 if (preg_match ("%^.*//([^/]*)/?.*$%", $cfg ['web_root'], $matches))
@@ -40,9 +43,19 @@ define ('MAX_VALID_UPLOAD_TIME', 60);
 define ('TOKEN_USE_LIMIT', "-2 hours");
 define ('TOKEN_LOGIN_LIMIT', "-15 minutes");
 define ('TOKEN_LOGOUT_LIMIT', "-8 hours");
-define ('DEFAULT_MODE', "footer");
-define ('DEFAULT_PERIOD', "month");
-define ('DEFAULT_LANG', "fr");
+if (!file_exists (VAR_CONFIG))
+    mkdir (VAR_CONFIG, 0755);
+if (!file_exists (FILE_CONFIG)) {
+    file_put_contents (FILE_CONFIG, "<?php".NL.
+                       "/* if error with DEFAULT_MODE, DEFAULT_PERIOD or DEFAULT_LANG then remove this file. */".NL.
+                       "define ('DEFAULT_MODE', 'footer');".NL.
+                       "define ('DEFAULT_PERIOD', 'month');".NL.
+                       "define ('DEFAULT_LANG', 'fr');".NL.NL);
+    define ('DEFAULT_MODE', 'footer');
+    define ('DEFAULT_PERIOD', 'month');
+    define ('DEFAULT_LANG', 'fr');
+} else
+    require (FILE_CONFIG);
 
 define ('E_BAD_ARCHIVE_NAME', 'Bad archive name format');
 define ('E_CREATE_ZIP', "Impossible de cr&eacute;er l'archive.");
diff --git a/src/cpp/eMailShrinker.cpp b/src/cpp/eMailShrinker.cpp
index 7a524a6..592ec91 100644
--- a/src/cpp/eMailShrinker.cpp
+++ b/src/cpp/eMailShrinker.cpp
@@ -33,8 +33,8 @@
 ////////////////////////////////////////////////////////////////////////////
 
 #include "version.hpp"
-const std::string kaz::LAST_VERSION_NUM ("2.20");
-const std::string kaz::LAST_VERSION_DATE ("2024-04-07");
+const std::string kaz::LAST_VERSION_NUM ("2.21");
+const std::string kaz::LAST_VERSION_DATE ("2024-06-04");
 const std::string kaz::LAST_VERSION (LAST_VERSION_NUM+" "+LAST_VERSION_DATE+" eMailShrinker");
 
 #include <iostream>