diff --git a/The-Upgrade-Guide.md b/The-Upgrade-Guide.md
index cb4a262..9172e11 100644
--- a/The-Upgrade-Guide.md
+++ b/The-Upgrade-Guide.md
@@ -29,7 +29,7 @@ Methods 2 and 3 will wipe the entire system partition, so you will need to re-in
 
 This method should not wipe your apps and data, but always remember to backup first.
 
-Step 1: do the official update. It will remove adb functions and AppLauncher will likely crash.
+Step 1: do the official update (you can only do it exactly ONCE). It will remove adb functions and AppLauncher will likely crash.
 
 Step 2: re-do the 3rd and 4th step from [this guide](https://github.com/HappyZ/dpt-tools/wiki/The-Ultimate-Rooting-Guide#0x3-obtain-android-adb-root-access)