diff --git a/README.md b/README.md
index bff80e5..e85ca79 100644
--- a/README.md
+++ b/README.md
@@ -54,14 +54,15 @@ Usage of dockerfile-json:
 ```Dockerfile
 ARG ALPINE_TAG=3.10
 
-FROM alpine:$ALPINE_TAG AS build
-RUN echo "Hello world" > abc
+FROM alpine:${ALPINE_TAG} AS build
+RUN --network=host echo "Hello world" > abc
 
 FROM build AS test
-RUN echo "foo" > bar
+RUN --security=insecure echo "foo" > bar
 
 FROM scratch
 COPY --from=build --chown=nobody:nobody abc .
+RUN --mount=type=bind,source=./abc,target=/def
 CMD ["echo"]
 ```