diff --git a/README.md b/README.md
index 87a88a0..e05b96b 100644
--- a/README.md
+++ b/README.md
@@ -3,6 +3,9 @@
 A docker image based in ubuntu to run docker containers inside docker containers with some extras:
 
 1. Easy to use ([More Info](#3-usage-guide)):
+> ## :warning::warning: WARNING :warning::warning:
+> The option `--privileged` is not secure. Just for dev or testing purposes.
+> To do this in the GOOD AND SECURE WAY just use: https://github.com/nestybox/sysbox
 ```
 docker run -it --privileged cruizba/ubuntu-dind
 ```