diff --git a/README.md b/README.md
index b8c0cd3..f76d448 100644
--- a/README.md
+++ b/README.md
@@ -154,8 +154,8 @@ Dockviz also supports receiving Docker image or container json data on standard
 ```
 $ curl -s http://localhost:4243/images/json?all=1 | dockviz images --tree
 $ curl -s http://localhost:4243/containers/json?all=1 | dockviz containers --dot | dot -Tpng -o containers.png
-$ echo -e "GET /images/json?all=1 HTTP/1.0\r\n" | nc -U /var/run/docker.sock | tail -n +5 | dockviz images --tree
-$ echo -e "GET /containers/json?all=1 HTTP/1.0\r\n" | nc -U /var/run/docker.sock | tail -n +5 | dockviz containers --dot | dot -Tpng -o containers.png
+$ echo -e "GET /images/json?all=1 HTTP/1.0\r\n" | nc -U /var/run/docker.sock | sed '1,/^$/d' | dockviz images --tree
+$ echo -e "GET /containers/json?all=1 HTTP/1.0\r\n" | nc -U /var/run/docker.sock | sed '1,/^$/d' | dockviz containers --dot | dot -Tpng -o containers.png
 ```
 
 Note: GNU netcat doesn't support `-U` (UNIX socket) flag, so OpenBSD variant can be used.