diff --git a/README.ja.md b/README.ja.md
index 64c74dc..32528bb 100644
--- a/README.ja.md
+++ b/README.ja.md
@@ -52,7 +52,7 @@ $ brew install ttyd
 
 ## :zap: インストール
 
-> ![NOTE]
+> [!NOTE]
 > cLive を使用するには前提条件があります。詳しくは [`前提条件`](#information_source-前提条件) を参照してください。
 
 ### Homebrew
diff --git a/README.md b/README.md
index 3f7f6a9..99f3a63 100644
--- a/README.md
+++ b/README.md
@@ -52,7 +52,7 @@ See the [ttyd documentation](https://github.com/tsl0922/ttyd#installation) for m
 
 ## :zap: Installation
 
-> ![NOTE]
+> [!NOTE]
 > There are prerequisites for using cLive. See [`Prerequisite`](#information_source-prerequisite) for details.
 
 ### Homebrew