diff --git a/package.json b/package.json
index a3ddebd..5c1df86 100644
--- a/package.json
+++ b/package.json
@@ -41,9 +41,8 @@
     "bee-animate": "^1.0.0",
     "bee-checkbox": "^1.0.1",
     "bee-form-control": "^1.0.2",
-    "bee-icon": "latest",
+    "bee-icon": "1.0.3",
     "classnames": "^2.2.5",
-    "object-assign": "latest",
     "tinper-bee-core": "latest"
   },
   "peerDependencies": {
diff --git a/src/Tree.js b/src/Tree.js
index 1021c9a..0a2be25 100644
--- a/src/Tree.js
+++ b/src/Tree.js
@@ -1,6 +1,5 @@
 /* eslint no-console:0 */
 import React from 'react';
-import assign from 'object-assign';
 import classNames from 'classnames';
 import {
   loopAllChildren,
@@ -528,7 +527,7 @@ class Tree extends React.Component {
       }
     }
     if (this.treeNodesStates && this.treeNodesStates[pos]) {
-      assign(cloneProps, this.treeNodesStates[pos].siblingPosition);
+      Object.assign(cloneProps, this.treeNodesStates[pos].siblingPosition);
     }
     return React.cloneElement(child, cloneProps);
   }
diff --git a/src/TreeNode.js b/src/TreeNode.js
index 52f9b43..29b6ebc 100644
--- a/src/TreeNode.js
+++ b/src/TreeNode.js
@@ -1,5 +1,4 @@
 import React from 'react';
-import assign from 'object-assign';
 import classNames from 'classnames';
 import Animate from 'bee-animate';
 import {
@@ -232,7 +231,7 @@ class TreeNode extends React.Component {
       if (props.openTransitionName) {
         animProps.transitionName = props.openTransitionName;
       } else if (typeof props.openAnimation === 'object') {
-        animProps.animation = assign({}, props.openAnimation);
+        animProps.animation = Object.assign({}, props.openAnimation);
         if (!transitionAppear) {
           delete animProps.animation.appear;
         }