diff --git a/package.json b/package.json
index 70afb2b..8969324 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "rc-scroll-anim",
-  "version": "2.5.4",
+  "version": "2.5.5",
   "description": "scroll-anim anim component for react",
   "keywords": [
     "react",
diff --git a/src/ScrollLink.jsx b/src/ScrollLink.jsx
index 27df89e..1993b23 100644
--- a/src/ScrollLink.jsx
+++ b/src/ScrollLink.jsx
@@ -89,18 +89,18 @@ class ScrollLink extends React.Component {
       toTop - toShow + 0.5 : toTop;
     this.initTime = Date.now();
     this.rafID = requestAnimationFrame(this.raf);
-    /* scrollLinkLists.forEach(item => {
+    scrollLinkLists.forEach(item => {
       if (item !== this) {
         item.remActive();
       }
     });
-    this.addActive(); */
+    this.addActive();
   }
 
   getElement = () => {
     this.clientHeight = this.target ? this.target.clientHeight : windowHeight();
     const elementDom = document.getElementById(this.props.to);
-    const elementRect = elementDom.getBoundingClientRect();
+    const elementRect = elementDom && elementDom.getBoundingClientRect();
     return { elementDom, elementRect };
   }
 
diff --git a/src/ScrollOverPack.jsx b/src/ScrollOverPack.jsx
index d743129..e8b373e 100644
--- a/src/ScrollOverPack.jsx
+++ b/src/ScrollOverPack.jsx
@@ -105,10 +105,11 @@ class ScrollOverPack extends ScrollElement {
         if (!item) {
           return null;
         }
+        const key = item.key || (Date.now() + Math.random()).toString(16).replace('.', '');
         return (
           item.type.isTweenOne ?
-            React.cloneElement(item, { ...item.props, paused: !show }) :
-            React.cloneElement(item, item.props, show && item.props.children)
+            React.cloneElement(item, { ...item.props, key, paused: !show }) :
+            React.cloneElement(item, { ...item.props, key }, show && item.props.children)
         );
       });
       childToRender = createElement(component, { ...props, ...componentProps }, children);
@@ -119,11 +120,12 @@ class ScrollOverPack extends ScrollElement {
           if (!item) {
             return null;
           }
+          const key = item.key || (Date.now() + Math.random()).toString(16).replace('.', '');
           // 判断 TweenOne;
           if (item.type.isTweenOne) {
-            return React.cloneElement(item, { reverse: true });
+            return React.cloneElement(item, { key, reverse: true });
           }
-          return React.cloneElement(item, {}, null);
+          return React.cloneElement(item, { key }, null);
         });
       } else {
         this.children = this.state.children;