diff --git a/README.md b/README.md
index a83b3a0..19d4a3e 100644
--- a/README.md
+++ b/README.md
@@ -21,7 +21,7 @@ Screenshot
 ## Install
 
 ```
-$ npm install aplayer
+$ npm install aplayer --save
 ```
 
 ## CDN
@@ -197,4 +197,4 @@ $ npm run build
 
 ## LICENSE
 
-MIT © [DIYgod](http://github.com/DIYgod)
\ No newline at end of file
+MIT © [DIYgod](http://github.com/DIYgod)
diff --git a/src/APlayer.js b/src/APlayer.js
index 71863b6..f338658 100644
--- a/src/APlayer.js
+++ b/src/APlayer.js
@@ -1,13 +1,13 @@
-/**
- * APlayer constructor function
- *
- * @param {Object} option - See README
- * @constructor
- */
 (() => {
     let APlayers = [];
 
     class APlayer {
+        /**
+         * APlayer constructor function
+         *
+         * @param {Object} option - See README
+         * @constructor
+         */
         constructor(option) {
 
             this.isMobile = navigator.userAgent.match(/(iPad)|(iPhone)|(iPod)|(android)|(webOS)/i);