diff --git a/2025/.DS_Store b/2025/.DS_Store
index 7f67fe3..8ae533b 100644
Binary files a/2025/.DS_Store and b/2025/.DS_Store differ
diff --git a/2025/404.html b/2025/404.html
new file mode 100644
index 0000000..8f2fc35
--- /dev/null
+++ b/2025/404.html
@@ -0,0 +1,9 @@
+<!DOCTYPE html>
+<html lang="ja">
+<head>
+  <meta http-equiv="refresh" content="0; url=/hello/2025/">
+</head>
+<body>
+  <p>Redirecting...</p>
+</body>
+</html>
