diff --git a/README.md b/README.md
index 591a0fb..2cb06b9 100644
--- a/README.md
+++ b/README.md
@@ -160,7 +160,7 @@ curl -X DELETE http://127.0.0.1:5000/path-to-file-or-folder
 ```
 
 <details>
-<summary><h2>Advance topics</h2></summary>
+<summary><h2>Advanced topics</h2></summary>
 
 ### Access Control
 
@@ -270,4 +270,4 @@ Copyright (c) 2022 dufs-developers.
 
 dufs is made available under the terms of either the MIT License or the Apache License 2.0, at your option.
 
-See the LICENSE-APACHE and LICENSE-MIT files for license details.
\ No newline at end of file
+See the LICENSE-APACHE and LICENSE-MIT files for license details.