diff --git a/README.md b/README.md
index 4cf2558..1a84f4f 100644
--- a/README.md
+++ b/README.md
@@ -25,6 +25,7 @@ ipasourcefolder="path/to/ipas/source/folder"
 ipadestfolder="/path/to/ipas/destinations/folder/"
 developer1="iPhone Developer: xxxxx (xxxxx)"
 mobileprovision1="/path/to/mobile/provision"
+bundleid="null.null" #use null.null if you want to use the default app bundleid
 ```