diff --git a/src/Home/HomeRoutes.php b/src/Home/HomeRoutes.php
index 1c7e0d4..ca63515 100644
--- a/src/Home/HomeRoutes.php
+++ b/src/Home/HomeRoutes.php
@@ -1,6 +1,7 @@
 <?php
 namespace Misuzu\Home;
 
+use RuntimeException;
 use Index\DateTime;
 use Index\Data\DbTools;
 use Index\Data\IDbConnection;