diff --git a/Dockerfile b/Dockerfile
index 467ebff..027238b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,7 +4,7 @@ from mcluseau/golang-builder:1.15.1 as build
 # ------------------------------------------------------------------------
 from alpine:3.12
 
-entrypoint mksquashfs /layer /layer.squashfs >&2 && base64 </layer.squashfs
+entrypoint mksquashfs /layer /layer.squashfs -noappend -comp xz >&2 && base64 </layer.squashfs
 
 run apk add --update squashfs-tools