diff --git a/README.md b/README.md
index 4d19819..7ad2fba 100644
--- a/README.md
+++ b/README.md
@@ -13,13 +13,19 @@ A GNU/Linux system is required in order to build DECODE OS.
 
 Here a list of package dependencies:
 ```
-zsh debootstrap sudo kpartx cgpt xz-utils qemu qemu-utils
+zsh sudo cgpt xz-utils qemu qemu-utils
 ```
 
 In addition one must install `vagrant` and `virtualbox` from latest
 published packages (do not use distro provided packages, as they are
 updated).
 
+To update this repository, simply issue:
+
+```
+$ git pull origin master && git submodule update --init --recursive --checkout
+```
+
 
 ## Getting started