diff --git a/doc/AndroidDocument.md b/doc/AndroidDocument.md
index 58c6fc9..52ce522 100644
--- a/doc/AndroidDocument.md
+++ b/doc/AndroidDocument.md
@@ -159,6 +159,10 @@ Help==>About Eclips点击Android对应的图标就可以查看版本了.
 类，导致SDK无法正常工作，解决方法如下:      
 Ø  请开发者在混淆配置文件proguard.cfg或proguard-project.txt的最后加上       
 
+    -keepattributes *Annotation*
+    -keep public class * extends android.app.Service
+    -keep public class com.google.vending.licensing.ILicensingService
+    -keep public class com.android.vending.licensing.ILicensingService
     -keep class com.gumptech.sdk.view.* {*;}
     -keep class com.gumptech.sdk.web.* {*;}
     -keep class com.gumptech.sdk.GumpSDK$Callback{