diff --git a/README.ja.md b/README.ja.md
index 9f75a40..522c95e 100644
--- a/README.ja.md
+++ b/README.ja.md
@@ -105,7 +105,7 @@ bundle exec rails db:create db:migrate
 
 ```
 # 他のウインドウでコマンドを実行
-bin/webpack-devserver
+bin/webpack-dev-server
 
 # メインウインドウでコマンドを実行
 bin/rails s
diff --git a/README.md b/README.md
index 36e71b3..2810c03 100644
--- a/README.md
+++ b/README.md
@@ -113,7 +113,7 @@ bundle exec rails db:create db:migrate
 
 ```
 # another window
-bin/webpack-devserver
+bin/webpack-dev-server
 
 # main window
 bin/rails s