diff --git a/Readme.md b/Readme.md
index 56308d03..1b79b512 100644
--- a/Readme.md
+++ b/Readme.md
@@ -47,7 +47,7 @@ Use Qt Creator to open `millgame.pro` , or use Visual Studio to open `millgame.s
 
 ### Flutter App
 
-Run `./flutter-init.sh` , and then use Android Studio or  Visual Studio Code to open `src/ui/flutter_app` to build Flutter App.
+Run `./flutter-init.sh` , copy `src/ui/flutter_app/android/key.properties.example` to `src/ui/flutter_app/android/key.properties`, modify it, and then use Android Studio or  Visual Studio Code to open `src/ui/flutter_app` to build Flutter App.
 
 ## Understanding the code base and participating in the project
 
diff --git a/src/ui/flutter_app/android/key.properties.example b/src/ui/flutter_app/android/key.properties.example
new file mode 100644
index 00000000..e2f094ed
--- /dev/null
+++ b/src/ui/flutter_app/android/key.properties.example
@@ -0,0 +1,4 @@
+storePassword=<password from previous step>
+keyPassword=<password from previous step>
+keyAlias=key
+storeFile=<location of the key store file, e.g. /Users/<user name>/key.jks>
\ No newline at end of file