diff --git a/CHANGELOG.md b/CHANGELOG.md
index f44471968..c2afadbf1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -637,7 +637,7 @@ mongodb:
   db: misskey
 ```
 3. migration ブランチに切り替え
-4. `npm i`
+4. `npx yarn install`
 5. `npm run build`
 6. `npm run migrate`
 7. master ブランチに戻す
diff --git a/docs/setup.en.md b/docs/setup.en.md
index 9bfa70f51..885c8c8a4 100644
--- a/docs/setup.en.md
+++ b/docs/setup.en.md
@@ -50,7 +50,7 @@ Please install and setup these softwares:
 
 5. Install misskey dependencies.
 
-	`npm install`
+	`npx yarn install`
 
 *4.* Configure Misskey
 ----------------------------------------------------------------
@@ -130,7 +130,7 @@ You can check if the service is running with `systemctl status misskey`.
 ### How to update your Misskey server to the latest version
 1. `git checkout master`
 2. `git pull`
-3. `npm install`
+3. `npx yarn install` or `yarn install`
 4. `NODE_ENV=production npm run build`
 5. `npm run migrate`
 6. Restart your Misskey process to apply changes
@@ -138,7 +138,7 @@ You can check if the service is running with `systemctl status misskey`.
 
 If you encounter any problems with updating, please try the following:
 1. `npm run clean` or `npm run cleanall`
-2. Retry update (Don't forget `npm i`)
+2. Retry update (Don't forget `npx yarn install` or `yarn install`)
 
 ----------------------------------------------------------------
 
diff --git a/docs/setup.fr.md b/docs/setup.fr.md
index 09ab305b4..74945858b 100644
--- a/docs/setup.fr.md
+++ b/docs/setup.fr.md
@@ -50,7 +50,7 @@ Installez les paquets suivants :
  
 5. Installez les dépendances de misskey.
 
-	`npm install`
+	`npx yarn install`
 
 *4.* Création du fichier de configuration
 ----------------------------------------------------------------
@@ -124,7 +124,7 @@ Vous pouvez vérifier si le service a démarré en utilisant la commande `system
 ### Méthode de mise à jour vers la plus récente version de Misskey
 1. `git checkout master`
 2. `git pull`
-3. `npm install`
+3. `npx yarn install`
 4. `NODE_ENV=production npm run build`
 5. `npm run migrate`
 
diff --git a/docs/setup.ja.md b/docs/setup.ja.md
index e8a11de69..b3b38ce83 100644
--- a/docs/setup.ja.md
+++ b/docs/setup.ja.md
@@ -51,7 +51,7 @@ adduser --disabled-password --disabled-login misskey
 
 5. Misskeyの依存パッケージをインストール
 
-	`npm install`
+	`npx yarn install`
 
 *4.* 設定ファイルを作成する
 ----------------------------------------------------------------
@@ -131,7 +131,7 @@ npm run init
 ### Misskeyを最新バージョンにアップデートする方法:
 1. `git checkout master`
 2. `git pull`
-3. `npm install`
+3. `npx yarn install`
 4. `NODE_ENV=production npm run build`
 5. `npm run migrate`