From 04d095d3bccafdb53d6f82f79285b3dc66de5ab3 Mon Sep 17 00:00:00 2001
From: xudong82113 <xudong82113@gmail.com>
Date: Sun, 30 Sep 2018 19:27:52 +0800
Subject: [PATCH] update README

---
 README.md | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/README.md b/README.md
index 6d46a97d4..73f28e5cb 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,15 @@ Inspired by [react-native-mp-android-chart](https://github.com/mskec/react-nativ
 
 React Native Charts Wrapper is built on MPAndroidChart(v3.0.3) & Charts(v3.1.1), support both android & iOS.
 
+## WARNING
+
+As Swift evolves, if you are not using latest Swift compiler, you shouldn't check out master branch. Instead, you should go to release page and pick up whatever suits you.
+
+* Xcode 10.0 / Swift 4.2 (master branch)
+* iOS >= 8.0 (Use as an **Embedded** Framework)
+* tvOS >= 9.0
+* macOS >= 10.11
+
 
 ### ANDROID 
 ![](https://raw.githubusercontent.com/wuxudong/react-native-charts-wrapper/master/screenshot/Android%20ScreenShot.png)