diff --git a/README.md b/README.md
index 6fe9eab..0aed177 100644
--- a/README.md
+++ b/README.md
@@ -51,9 +51,14 @@ $ kubectl run peerjs-server --image=peerjs/peerjs-server --port 9000 --expose --
 If you have your own server, you can attach PeerServer.
 
 1. Install the package:
-    ```sh
-    #$ cd your-project-path
+    ```bash
+    # $ cd your-project-path
+    
+    # with npm
     $ npm install peer
+    
+    # with yarn
+    $ yarn add peer
     ```
 2. Use PeerServer object to create a new server:
     ```javascript