diff --git a/README.md b/README.md
index e605439..8e3670c 100644
--- a/README.md
+++ b/README.md
@@ -103,7 +103,9 @@ sudo docker run -d \
 
 ## Install AltStore on iOS Device
 
-You can run this command to install AltStore to your device:
+1. Make sure you have your Device UDID (can be found using [this guide](https://discussions.apple.com/thread/250783627)).
+
+2. Run this command to install AltStore to your device:
 
 ```shell
 docker exec -it altserver /altserver/bin/AltServer -u "<UDID>" -a "<Apple ID>" -p "<Password>" /altserver/bin/AltStore.ipa