diff --git a/scripts/mkimage b/scripts/mkimage
index 9de16df697..953026afb1 100755
--- a/scripts/mkimage
+++ b/scripts/mkimage
@@ -325,7 +325,7 @@ fi
 
 # gzip
 echo "image: compressing..."
-gzip -f "${DISK}"
+pigz --best --force "${DISK}"
 
 # set owner
 if [ -n "${SUDO_USER}" ]; then