diff --git a/index.js b/index.js
index 00a1e0b6b2270ebd3c8da5229b55138c5d0d898d..960be0024e8a4b2efd714ebea9389a9523e49867 100644
--- a/index.js
+++ b/index.js
@@ -58,18 +58,12 @@ export default class PickerAny extends React.Component {
 		this.setState(newState);
 	}
 
-	//todo
-	/*shouldComponentUpdate(props, state, context){
-		let newProps = Object.assign({}, props);
-		let newState = Object.assign({}, state);
-		let oldProps = Object.assign({}, this.props);
-		let oldState = Object.assign({}, this.state);
-		let arr = [newProps, newState, oldProps, oldState];
-		for(let i in arr){
-			delete arr[i].slideAnim;
+	shouldComponentUpdate(nextProps, nextState, context){
+		if(JSON.stringify(nextState.selectedValue) === JSON.stringify(this.state.selectedValue)){
+			return false;
 		}
-		return JSON.stringify([newProps, newState, context]) !== JSON.stringify([oldProps, oldState, this.context]);
-	}*/
+		return true;
+	}
 
 	_getStateFromProps(props){
 		//the pickedValue must looks like [wheelone's, wheeltwo's, ...]
diff --git a/package.json b/package.json
index 1e96aee8152cdc651ac2d6daa459d57daf2a98a3..e9306b369f58f08c7b4339693558037a0cd6a699 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "react-native-picker",
-  "version": "0.2.11",
+  "version": "0.3.0",
   "description": "react-native-picker",
   "main": "index.js",
   "scripts": {