diff --git a/exercises/hello_react/problem.en.md b/exercises/hello_react/problem.en.md
index 3669032..eafb99a 100644
--- a/exercises/hello_react/problem.en.md
+++ b/exercises/hello_react/problem.en.md
@@ -8,7 +8,7 @@ You can change `learnyoureact` to any name you like.
 
 Start by installing the required modules. Run this command:
 
-`$ npm install react react-dom express body-parser express-react-views@0.9.0 babel@5.8.23`
+`$ npm install --save react react-dom express body-parser express-react-views@0.9.0 babel@5.8.23`
 
 You can see `node_modules` directory maked.
 Files of module is in the directory.
@@ -18,8 +18,9 @@ Folder structure is below.
 
 ```
 learnyoureact
-├── program.js
-└── node_modules
+├── node_modules/
+├── package.json
+└── program.js
 ```
 
 Copy the code below into `program.js`.
diff --git a/exercises/hello_react/problem.ko.md b/exercises/hello_react/problem.ko.md
index 0e96e7c..3dd5b3a 100644
--- a/exercises/hello_react/problem.ko.md
+++ b/exercises/hello_react/problem.ko.md
@@ -9,7 +9,7 @@ package.json 하여 npm 은 어느 폴더에 패키지 를 설치 하거나 판
 
 필요한 모듈을 설치하려면 밑의 명령을 실행해 보세요.
 
-`$ npm install react react-dom express body-parser express-react-views@0.9.0 babel@5.8.23`
+`$ npm install --save react react-dom express body-parser express-react-views@0.9.0 babel@5.8.23`
 
 이제 `node_modules` 디렉터리가 만들어진 것을 볼 수 있습니다.
 
@@ -17,8 +17,9 @@ package.json 하여 npm 은 어느 폴더에 패키지 를 설치 하거나 판
 
 ```
 learnyoureact
-├── program.js
-└── node_modules
+├── node_modules/
+├── package.json
+└── program.js
 ```
 
 `program.js`에 다음 코드를 복사하세요.
diff --git a/exercises/hello_react/problem.md b/exercises/hello_react/problem.md
index dd4f154..14a90ba 100644
--- a/exercises/hello_react/problem.md
+++ b/exercises/hello_react/problem.md
@@ -10,7 +10,7 @@ package.jsonによって、npmはどのフォルダにパッケージをイン
 それができたら、そのフォルダの中にモジュールをインストールしましょう。
 以下のコマンドを実行してください。
 
-`$ npm install react react-dom express body-parser express-react-views@0.9.0 babel@5.8.23`
+`$ npm install --save react react-dom express body-parser express-react-views@0.9.0 babel@5.8.23`
 
 `node_modules` というフォルダが作成されたかと思います。その中にモジュールのフォルダがあります。
 
@@ -19,8 +19,9 @@ package.jsonによって、npmはどのフォルダにパッケージをイン
 
 ```
 learnyoureact
-├── program.js
-└── node_modules
+├── node_modules/
+├── package.json
+└── program.js
 ```
 
 `program.js` には以下のように記述してください。