diff --git a/kiri-gii/Gii.php b/kiri-gii/Gii.php
index e0aabaea..aff57853 100644
--- a/kiri-gii/Gii.php
+++ b/kiri-gii/Gii.php
@@ -25,8 +25,8 @@ class Gii
 {
 	private ?string $tableName = NULL;
 
-	/** @var Connection */
-	private Connection $db;
+	/** @var null|Connection */
+	private ?Connection $db;
 
 	private InputInterface $input;