diff --git a/src/DropdownMenu.jsx b/src/DropdownMenu.jsx
index b4704c71b..6192fd9ea 100644
--- a/src/DropdownMenu.jsx
+++ b/src/DropdownMenu.jsx
@@ -1,14 +1,13 @@
 import React, { cloneElement } from 'react';
 import { findDOMNode } from 'react-dom';
 import PropTypes from 'prop-types';
-import createClass from 'create-react-class';
 import toArray from 'rc-util/lib/Children/toArray';
 import Menu from 'rc-menu';
 import scrollIntoView from 'dom-scroll-into-view';
 import { getSelectKeys, preventDefaultEvent } from './util';
 
-const DropdownMenu = createClass({
-  propTypes: {
+export default class DropdownMenu extends React.Component {
+  static propTypes= {
     defaultActiveFirstOption: PropTypes.bool,
     value: PropTypes.any,
     dropdownMenuStyle: PropTypes.object,
@@ -20,16 +19,16 @@ const DropdownMenu = createClass({
     menuItems: PropTypes.any,
     inputValue: PropTypes.string,
     visible: PropTypes.bool,
-  },
+  }
 
   componentWillMount() {
     this.lastInputValue = this.props.inputValue;
-  },
+  }
 
   componentDidMount() {
     this.scrollActiveItemToView();
     this.lastVisible = this.props.visible;
-  },
+  }
 
   shouldComponentUpdate(nextProps) {
     if (!nextProps.visible) {
@@ -37,7 +36,7 @@ const DropdownMenu = createClass({
     }
     // freeze when hide
     return nextProps.visible;
-  },
+  }
 
   componentDidUpdate(prevProps) {
     const props = this.props;
@@ -46,9 +45,9 @@ const DropdownMenu = createClass({
     }
     this.lastVisible = props.visible;
     this.lastInputValue = props.inputValue;
-  },
+  }
 
-  scrollActiveItemToView() {
+  scrollActiveItemToView = () => {
     // scroll into view
     const itemComponent = findDOMNode(this.firstActiveItem);
     if (itemComponent) {
@@ -56,7 +55,7 @@ const DropdownMenu = createClass({
         onlyScrollIfNeeded: true,
       });
     }
-  },
+  }
 
   renderMenu() {
     const props = this.props;
@@ -127,7 +126,7 @@ const DropdownMenu = createClass({
       </Menu>);
     }
     return null;
-  },
+  }
 
   render() {
     const renderMenu = this.renderMenu();
@@ -140,8 +139,7 @@ const DropdownMenu = createClass({
         {renderMenu}
       </div>
     ) : null;
-  },
-});
+  }
+}
 
 DropdownMenu.displayName = 'DropdownMenu';
-export default DropdownMenu;
diff --git a/src/SelectTrigger.jsx b/src/SelectTrigger.jsx
index 46581c235..21140ae1e 100644
--- a/src/SelectTrigger.jsx
+++ b/src/SelectTrigger.jsx
@@ -1,7 +1,6 @@
 import Trigger from 'rc-trigger';
 import React from 'react';
 import PropTypes from 'prop-types';
-import createClass from 'create-react-class';
 import classnames from 'classnames';
 import DropdownMenu from './DropdownMenu';
 import ReactDOM from 'react-dom';
@@ -28,8 +27,8 @@ const BUILT_IN_PLACEMENTS = {
   },
 };
 
-const SelectTrigger = createClass({
-  propTypes: {
+export default class SelectTrigger extends React.Component {
+  static propTypes= {
     onPopupFocus: PropTypes.func,
     dropdownMatchSelectWidth: PropTypes.bool,
     dropdownAlign: PropTypes.object,
@@ -44,7 +43,7 @@ const SelectTrigger = createClass({
     prefixCls: PropTypes.string,
     popupClassName: PropTypes.string,
     children: PropTypes.any,
-  },
+  }
 
   componentDidUpdate() {
     const { visible, dropdownMatchSelectWidth } = this.props;
@@ -55,17 +54,17 @@ const SelectTrigger = createClass({
         dropdownDOMNode.style[widthProp] = `${ReactDOM.findDOMNode(this).offsetWidth}px`;
       }
     }
-  },
+  }
 
-  getInnerMenu() {
+  getInnerMenu = () => {
     return this.popupMenu && this.popupMenu.refs.menu;
-  },
+  }
 
-  getPopupDOMNode() {
+  getPopupDOMNode = () => {
     return this.refs.trigger.getPopupDomNode();
-  },
+  }
 
-  getDropdownElement(newProps) {
+  getDropdownElement = (newProps) => {
     const props = this.props;
     return (<DropdownMenu
       ref={this.saveMenu}
@@ -77,24 +76,25 @@ const SelectTrigger = createClass({
       defaultActiveFirstOption={props.defaultActiveFirstOption}
       dropdownMenuStyle={props.dropdownMenuStyle}
     />);
-  },
+  }
 
-  getDropdownTransitionName() {
+  getDropdownTransitionName = () => {
     const props = this.props;
     let transitionName = props.transitionName;
     if (!transitionName && props.animation) {
       transitionName = `${this.getDropdownPrefixCls()}-${props.animation}`;
     }
     return transitionName;
-  },
+  }
 
-  getDropdownPrefixCls() {
+  getDropdownPrefixCls = () => {
     return `${this.props.prefixCls}-dropdown`;
-  },
+  }
 
-  saveMenu(menu) {
+  saveMenu = (menu) => {
     this.popupMenu = menu;
-  },
+  }
+
   render() {
     const { onPopupFocus, ...props } = this.props;
     const { multiple, visible, inputValue, dropdownAlign,
@@ -135,9 +135,7 @@ const SelectTrigger = createClass({
       popupClassName={classnames(popupClassName)}
       popupStyle={props.dropdownStyle}
     >{props.children}</Trigger>);
-  },
-});
+  }
+}
 
 SelectTrigger.displayName = 'SelectTrigger';
-
-export default SelectTrigger;