diff --git a/vm/pimox-haos-vm.sh b/vm/pimox-haos-vm.sh
index 9fc13f2c..b4694f2b 100644
--- a/vm/pimox-haos-vm.sh
+++ b/vm/pimox-haos-vm.sh
@@ -290,7 +290,7 @@ echo -en "\e[1A\e[0K"
 FILE=$(basename $URL)
 msg_ok "Downloaded ${CL}${BL}haos_generic-aarch64-${BRANCH}.qcow2.xz${CL}"
 msg_info "Extracting Disk Image"
-unxz $FILE
+unxz -T4 $FILE  #use -T4, full speed decompression
 STORAGE_TYPE=$(pvesm status -storage $STORAGE | awk 'NR>1 {print $2}')
 case $STORAGE_TYPE in
 nfs | dir)