diff --git a/README.md b/README.md
index 0fa84c0..edf56e8 100644
--- a/README.md
+++ b/README.md
@@ -41,7 +41,7 @@ Mount or umount the root filesystem from the given VM. For example `systemd star
 | `xen_vman_mount_timeout`                 | integer               |                                 `20`                                | Maximum time in seconds to wait for mount before systemd unit enters failed state                                                     |
 | `xen_vman_umount_timeout`                | integer               |                                 `20`                                | Maximum time in seconds to wait for umount before systemd unit enters failed state                                                    |
 | `xen_vman_public_keys`                   | list of strings       |                                 `[]`                                | List of public keys to add to the newly generated user in the VM                                                                      |
-| `xen_vman_nfsroot_base`                  | string                |                                 ` `                                 | Path to prepend to all NFS paths                                                                                                      |
+| `xen_vman_nfsroot_base`                  | string                |                          _required for NFS_                         | Path to prepend to all NFS paths                                                                                                      |
 | `xen_vman_iscsi_server`                  | string                |                         _required for iSCSI_                        | iSCSI server to connect to                                                                                                            |
 | `xen_vman_iscsi_base_wwn`                | string                |                         _required for iSCSI_                        | Base of the WWN name                                                                                                                  |
 | `xen_vman_debootstrap_packages`          | list of strings       | `[systemd,systemd-sysv,udev,resolvconf,openssh-server,sudo,python]` | Packages to install into a newly installed VM using debootstrap                                                                       |
@@ -52,14 +52,14 @@ Mount or umount the root filesystem from the given VM. For example `systemd star
 | `xen_vman_default_disks`                 | list of strings       |                                 `[]`                                | Xen disk specification (see also [xl-disk-configuration.txt](http://xenbits.xen.org/docs/4.8-testing/misc/xl-disk-configuration.txt)) |
 | `xen_vman_default_manual_root_disk`      | boolean               |                               `False`                               | Use only disk specified by `xen_vman_default_disks` or `vm.disks`                                                                     |
 | `xen_vman_default_filesystem`            | string                |                                `ext4`                               | Filesystem to use for VMs with iSCSI root disk                                                                                        |
-| `xen_vman_default_gateway`               | string                |                                 ` `                                 | Default gateway of the new VM                                                                                                         |
+| `xen_vman_default_gateway`               | string                |        _required for a default route on newly installed vms_        | Default gateway of the new VM                                                                                                         |
 | `xen_vman_default_nameserver`            | list of strings       |                         `[8.8.8.8, 8.8.4.4]`                        | Nameservers to initially set for the new VMs                                                                                          |
 | `xen_vman_default_boot_after_creation`   | boolean               |                                `True`                               | Start the VM after installation                                                                                                       |
 | `xen_vman_default_auto_boot`             | boolean               |                                `True`                               | Start VM when hypervisor boots                                                                                                        |
 | `xen_vman_default_builder`               | string                |                              `generic`                              | Select the domU guest type, valid values are `generic` (para virtualization) and `hvm` (all hardware is emulated)                     |
 | `xen_vman_default_kernel`                | string                |                         **auto determined**                         | Path to the kernel to use for generic VMs                                                                                             |
 | `xen_vman_default_initrd`                | string                |                         **auto determined**                         | Path to the initrd to use for generic VMs                                                                                             |
-| `xen_vman_default_cmdline`               | string                |                                 ` `                                 | Command line to pass to the kernel for generic VMs                                                                                    |
+| `xen_vman_default_cmdline`               | string                |                                 `""`                                | Command line to pass to the kernel for generic VMs                                                                                    |
 | `xen_vman_default_spice`                 | boolean               |                                False                                | Allow access to the display via the SPICE protocol [²](#xen_doc)                                                                      |
 | `xen_vman_default_spicehost`             | string (IP-Address)   |                              `0.0.0.0`                              | Specify the interface address to listen on if given, defaults to any interface [²](#xen_doc)                                          |
 | `xen_vman_default_spiceport`             | integer               |                                `3100`                               | Specify the port to listen on by the SPICE server if SPICE is enabled [²](#xen_doc)                                                   |