diff --git a/mobile.md b/mobile.md
index 17be20e92..2b4e8e358 100644
--- a/mobile.md
+++ b/mobile.md
@@ -13,5 +13,6 @@
 
 ## Develop without opening Android Studio
 1. brew install gradle
-2. cd web/android && gradle wrapper
-3. install android sdk 30
+2. make sure java version using 11
+3. cd web/android && gradle wrapper
+4. install android sdk 30