diff --git a/README.md b/README.md
index 281eb40..fde1eda 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,13 @@ Simcard management for GLPI
 * Updated by Anthony Piesset and Dethegeek for GLPi 0.84
 * Updated by Thierry Bugier Pineau for GLPi 0.85 and 0.90
 
+Integration in GLPI 9.4
+-----------------------
+
+Beside what they wrote, the way that GLPI handle SIM Card in core modules is really awful.
+Plugin is a lot better for Sim Card Management.
+
+
 Integration in GLPI 9.2
 -----------------------
 
diff --git a/front/simcard.form.php b/front/simcard.form.php
index 49a857a..5c716ab 100644
--- a/front/simcard.form.php
+++ b/front/simcard.form.php
@@ -27,6 +27,7 @@
  @link      http://www.glpi-project.org/
  @since     2009
  ---------------------------------------------------------------------- */
+use Glpi\Event;
 
 include ('../../../inc/includes.php');
 
diff --git a/hook.php b/hook.php
index 28a8587..3662f1c 100644
--- a/hook.php
+++ b/hook.php
@@ -40,20 +40,20 @@
  * @return number
  */
 function plugin_simcard_currentVersion() {
-   
+   global $DB;
    // Saves the current version to not re-detect it on multiple calls
    static $currentVersion = null;
    
    if ($currentVersion === null) {
       // result not cached
       if (
-         !TableExists('glpi_plugin_simcard_simcards_items') && 
-         !TableExists('glpi_plugin_simcard_configs')
+         !$DB->tableExists('glpi_plugin_simcard_simcards_items') && 
+         !$DB->tableExists('glpi_plugin_simcard_configs')
       ) {
          // the plugin seems not installed
          $currentVersion = 0;
       } else {      
-         if (TableExists('glpi_plugin_simcard_configs')) {
+         if ($DB->tTableExists('glpi_plugin_simcard_configs')) {
             // The plugin is at least 1.3
             // Get the current version in the plugin's configuration
             $pluginSimcardConfig = new PluginSimcardConfig();
diff --git a/inc/simcard_item.class.php b/inc/simcard_item.class.php
index 2f414a8..d9c31dd 100644
--- a/inc/simcard_item.class.php
+++ b/inc/simcard_item.class.php
@@ -135,7 +135,7 @@ static function registerItemtype($itemtype) {
    static function install(Migration $migration) {
       global $DB;
       $table = getTableForItemType(__CLASS__);
-      if (!TableExists($table)) {
+      if (!$DB->tableExists($table)) {
          $query = "CREATE TABLE IF NOT EXISTS `$table` (
               `id` int(11) NOT NULL AUTO_INCREMENT,
               `items_id` int(11) NOT NULL DEFAULT '0' COMMENT 'RELATION to various table, according to itemtype (id)',