diff --git a/Offline.md b/Offline.md
index 2763edf..acecc6a 100644
--- a/Offline.md
+++ b/Offline.md
@@ -1,4 +1,4 @@
-## Windows version offline
+## a) Windows version offline
 
 1. Download wekan-VERSION.zip from https://releases.wekan.team
 
@@ -30,7 +30,7 @@ Then Wekan will be at http://192.168.0.100:2000/sign-in
 
 9. Double click `start-wekan.bat` to run it. (It may need right click, Run as Administrator).
 
-## How to install Wekan to VirtualBox and copy to offline computer
+## b) How to install Wekan to VirtualBox and copy to offline computer
 
 1. Install [VirtualBox](https://www.virtualbox.org/)