diff --git a/img/messages/close.png b/img/messages/close.png
old mode 100755
new mode 100644
diff --git a/img/messages/cross.png b/img/messages/cross.png
old mode 100755
new mode 100644
diff --git a/img/messages/help.png b/img/messages/help.png
old mode 100755
new mode 100644
diff --git a/img/messages/tick.png b/img/messages/tick.png
old mode 100755
new mode 100644
diff --git a/img/messages/warning.png b/img/messages/warning.png
old mode 100755
new mode 100644
diff --git a/inc/config.php b/inc/config.php
index 2de725f..bd9287f 100644
--- a/inc/config.php
+++ b/inc/config.php
@@ -14,6 +14,7 @@ if (!is_dir('db/')) {
     @mkdir('db/',0705);
 }
 
+define ('MODE_DEMO', FALSE);
 define ('ABS_PATH', 'assets/');
 define ('CONVERT_LINKS_FOOTNOTES', TRUE);
 define ('REVERT_FORCED_PARAGRAPH_ELEMENTS',FALSE);
diff --git a/inc/store/sqlite.class.php b/inc/store/sqlite.class.php
index 4bfbb29..2108160 100644
--- a/inc/store/sqlite.class.php
+++ b/inc/store/sqlite.class.php
@@ -74,6 +74,13 @@ class Sqlite extends Store {
         return isset($pass[0]['value']) ? $pass[0]['value'] : FALSE; 
     }
 
+    public function updatePassword($password)
+    {
+        $sql_update     = "UPDATE config SET value=? WHERE name='password'";
+        $params_update  = array($password);
+        $query          = $this->executeQuery($sql_update, $params_update);
+    }
+
     private function executeQuery($sql, $params) {
         try
         {
diff --git a/index.php b/index.php
index 91d0b30..0a778d0 100644
--- a/index.php
+++ b/index.php
@@ -54,14 +54,17 @@ elseif  (isset($_GET['config'])) {
     if (isset($_POST['password']) && isset($_POST['password_repeat'])) {
         if ($_POST['password'] == $_POST['password_repeat'] && $_POST['password'] != "") {
             logm('password updated');
-            $store->updatePassword(encode_string($_POST['password'] . $_SESSION['login']));
-            $msg->add('s', 'your password has been updated');
+            if (!DEMO) {
+                $store->updatePassword(encode_string($_POST['password'] . $_SESSION['login']));
+                $msg->add('s', 'your password has been updated');
+            }
+            else {
+                $msg->add('i', 'in demo mode, you can\'t update password');
+            }
         }
         else
             $msg->add('e', 'your password can\'t be empty and you have to repeat it in the second field');
     }
-    else
-        $msg->add('e', 'error in your password update');
 }
 
 # Traitement des paramètres et déclenchement des actions