diff --git a/sys0-code/install/create_db.php b/sys0-code/install/create_db.php
index 969ff3e..615012a 100644
--- a/sys0-code/install/create_db.php
+++ b/sys0-code/install/create_db.php
@@ -27,7 +27,8 @@ $sql = "CREATE TABLE IF NOT EXISTS users (
 	telegram_id VARCHAR(50),
 	notification_way INT,
 	notification_mail INT,
-	notification_telegram INT
+	notification_telegram INT,
+ 	class_id INT
 	)";
 $link->query($sql);
 //printer table
@@ -46,6 +47,12 @@ $sql = "CREATE TABLE IF NOT EXISTS printer (
         )";
 $link->query($sql);
 
+$sql = "CREATE TABLE IF NOT EXISTS class (
+        id INT AUTO_INCREMENT PRIMARY KEY,
+        name VARCHAR(50)
+        )";
+$link->query($sql);
+
 //queue table
 $sql = "CREATE TABLE IF NOT EXISTS queue (
         id INT AUTO_INCREMENT PRIMARY KEY,