diff --git a/GumpTechDocument.md b/GumpTechDocument.md
index 6e4a431..b1a1a86 100644
--- a/GumpTechDocument.md
+++ b/GumpTechDocument.md
@@ -3,7 +3,7 @@
 
 SDK下载地址
 -------------------------------
-    Android SDK 下载地址：[click here](https://s3-ap-southeast-1.amazonaws.com/sletsgame/sdk/GumpSDK-Android.rar)      
+    Android SDK 下载地址：[click here](http://s3-ap-southeast-1.amazonaws.com/sletsgame/sdk/GumpSDK-Android.rar)      
     IOS SDk     下载地址：[click here]()