diff --git a/package.json b/package.json
index 4d60947..c006a0e 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "react-activation",
-  "version": "0.3.3",
+  "version": "0.3.4",
   "description": "<KeepAlive /> for React like <keep-alive /> in vue",
   "main": "index.js",
   "scripts": {
diff --git a/src/core/KeepAlive.js b/src/core/KeepAlive.js
index 6663f57..237d703 100644
--- a/src/core/KeepAlive.js
+++ b/src/core/KeepAlive.js
@@ -255,6 +255,7 @@ class KeepAlive extends Component {
     return (
       <div
         key="keep-alive-placeholder"
+        className="ka-wrapper"
         ref={node => {
           this.placeholder = node
         }}
@@ -266,8 +267,8 @@ class KeepAlive extends Component {
 // 兼容 SSR 服务端渲染
 function SSRKeepAlive({ children }) {
   return (
-    <div key="keep-alive-placeholder">
-      <div key="keeper-container">{children}</div>
+    <div key="keep-alive-placeholder" className="ka-wrapper">
+      <div key="keeper-container" className="ka-content">{children}</div>
     </div>
   )
 }
diff --git a/src/core/Keeper.js b/src/core/Keeper.js
index c2bda2f..5fcc83f 100644
--- a/src/core/Keeper.js
+++ b/src/core/Keeper.js
@@ -125,7 +125,7 @@ export default class Keeper extends Component {
           this.wrapper = node
         }}
       >
-        <div key="keeper-container">
+        <div key="keeper-container" className="ka-content">
           <Bridge id={id} bridgeProps={bridgeProps}>
             <AliveNodeProvider value={this.contextValue}>
               {children}