update readme

coderbean · coderbean · commit 6beb43b3712d · 2019-08-11T15:35:10.000+08:00
diff --git a/README.md b/README.md
@@ -3,6 +3,8 @@ Another Windows GUI for Clash
 
 **.NET Framwork 4.7.2+ required**
 
+**Support 64-bit windows os only**
+
 # Quick Start
 1. download at [this page](https://github.com/coderbean/ClashNet/releases)
 2. unzip 
