diff --git a/index.php b/index.php
index 3a86230..47747e4 100644
--- a/index.php
+++ b/index.php
@@ -47,7 +47,7 @@ class JobSql implements ISqlBase {
 }
 
 class Job extends BaseModel {
-    private $sql = new JobSql();
+    private static $sql = new JobSql();
     public function __construct() {
         parent::__construct( new JobSql() );
     }