diff --git a/README.md b/README.md
index 3529770..136e892 100644
--- a/README.md
+++ b/README.md
@@ -19,7 +19,7 @@ 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 libarchive-tools libcap2-bin grep rsync xz-utils file git curl bc \
-gpg pigz
+gpg pigz xxd
 ```
 
 The file `depends` contains a list of tools needed.  The format of this