diff --git a/README.ja.md b/README.ja.md
index 9b418cfd..c87c59aa 100644
--- a/README.ja.md
+++ b/README.ja.md
@@ -18,9 +18,12 @@
 
 [最新バージョン](https://github.com/technote-space/marker-animation/releases/latest/download/release.zip)
 
+## Table of Contents
+
 <!-- START doctoc generated TOC please keep comment here to allow auto update -->
 <!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->
-**Table of Contents**
+<details>
+<summary>Details</summary>
 
 - [スクリーンショット](#%E3%82%B9%E3%82%AF%E3%83%AA%E3%83%BC%E3%83%B3%E3%82%B7%E3%83%A7%E3%83%83%E3%83%88)
   - [動作](#%E5%8B%95%E4%BD%9C)
@@ -49,6 +52,7 @@
 - [Author](#author)
 - [プラグイン作成用フレームワーク](#%E3%83%97%E3%83%A9%E3%82%B0%E3%82%A4%E3%83%B3%E4%BD%9C%E6%88%90%E7%94%A8%E3%83%95%E3%83%AC%E3%83%BC%E3%83%A0%E3%83%AF%E3%83%BC%E3%82%AF)
 
+</details>
 <!-- END doctoc generated TOC please keep comment here to allow auto update -->
 
 ## スクリーンショット
diff --git a/README.md b/README.md
index f70fab34..5b69fcc6 100644
--- a/README.md
+++ b/README.md
@@ -18,9 +18,12 @@ This plugin will add the ability to display animations like painting with a high
 
 [Latest version](https://github.com/technote-space/marker-animation/releases/latest/download/release.zip)
 
+## Table of Contents
+
 <!-- START doctoc generated TOC please keep comment here to allow auto update -->
 <!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->
-**Table of Contents**
+<details>
+<summary>Details</summary>
 
 - [Screenshots](#screenshots)
   - [Behavior](#behavior)
@@ -48,6 +51,7 @@ This plugin will add the ability to display animations like painting with a high
 - [Author](#author)
 - [Plugin framework](#plugin-framework)
 
+</details>
 <!-- END doctoc generated TOC please keep comment here to allow auto update -->
 
 ## Screenshots