diff --git a/README.md b/README.md
index e62df1459..c4dea4b6b 100644
--- a/README.md
+++ b/README.md
@@ -760,7 +760,7 @@ After everything has been installed and preconfigured in the **chrooted** enviro
 It is simple and easy, using "dd"
 
 ```shell
-sudo dd if=ubuntu-from-scratch.iso of=<device> status=progress oflag=sync
+sudo dd if=ubuntu-from-scratch.iso of=<device> status=progress oflag=sync bs=4M
 ```
 
 ## Summary