diff --git a/docs/setup.en.md b/docs/setup.en.md
index bb26beb4bc..72da57a9aa 100644
--- a/docs/setup.en.md
+++ b/docs/setup.en.md
@@ -22,7 +22,7 @@ adduser --disabled-password --disabled-login misskey
 Please install and setup these softwares:
 
 #### Dependencies :package:
-* **[Node.js](https://nodejs.org/en/)**
+* **[Node.js](https://nodejs.org/en/)** >= 10.0.0
 * **[MongoDB](https://www.mongodb.com/)** >= 3.6
 
 ##### Optional
diff --git a/docs/setup.ja.md b/docs/setup.ja.md
index c3a24032ff..606857219a 100644
--- a/docs/setup.ja.md
+++ b/docs/setup.ja.md
@@ -22,7 +22,7 @@ adduser --disabled-password --disabled-login misskey
 これらのソフトウェアをインストール・設定してください:
 
 #### 依存関係 :package:
-* **[Node.js](https://nodejs.org/en/)**
+* **[Node.js](https://nodejs.org/en/)** (10.0.0以上)
 * **[MongoDB](https://www.mongodb.com/)** (3.6以上)
 
 ##### オプション