diff --git a/README.md b/README.md
index 29d81667d4..3b0a7a436d 100644
--- a/README.md
+++ b/README.md
@@ -14,7 +14,7 @@ To install the required dependencies for pi-gen you should run:
 
 ```bash
 apt-get install coreutils quilt parted qemu-user-static debootstrap zerofree zip \
-dosfstools bsdtar libcap2-bin grep rsync xz-utils file git curl bc
+dosfstools bsdtar libcap2-bin grep rsync xz-utils file git curl bc xxd
 ```
 
 The file `depends` contains a list of tools needed.  The format of this