diff --git a/README-zh_CN.md b/README-zh_CN.md
index 088e93ae00..b8e8795426 100644
--- a/README-zh_CN.md
+++ b/README-zh_CN.md
@@ -42,7 +42,7 @@ ReactDOM.render(<Datepicker />, mountNode);
 ### 按需使用
 
 ```jsx
-import "antd/lib/index.css"; // 只需在页面入口模块引用一次
+import 'antd/lib/index.css'; // 只需在页面入口模块引用一次
 import Datepicker from 'antd/lib/datepicker';
 ReactDOM.render(<Datepicker />, mountNode);
 ```
diff --git a/README.md b/README.md
index bff21cf5cc..b3ce94ef4f 100644
--- a/README.md
+++ b/README.md
@@ -37,7 +37,7 @@ ReactDOM.render(<Datepicker />, mountNode);
 ### Use on demand
 
 ```jsx
-import "antd/lib/index.css"; // only need to import once in entry module
+import 'antd/lib/index.css'; // only need to import once in entry module
 import Datepicker from 'antd/lib/datepicker';
 ReactDOM.render(<Datepicker />, mountNode);
 ```