diff --git a/README.md b/README.md
index 63de0f5..430eab2 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# react.js hello world
+# react.js hello world . . . . . . . . . 
 ---
 first, you should install node and npm.
 
diff --git a/package.json b/package.json
index d1195c2..3b6bd64 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,7 @@
   "main": "index.js",
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1",
-    "start": "webpack-dev-server --hot"
+    "start": "webpack-dev-server --host 0.0.0.0 --port 7777"
   },
   "author": "",
   "license": "ISC",