diff --git a/README.md b/README.md
index 26b25a5..5244551 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,7 @@
+# WARNING !!!!!!!!!!!!!
+
+All files in the `--dest-dir=` will be deleted.  If you set `--dest-dir=./` you will lose work!
+
 # `bazel-coverage-report`
 
 [![Build Status](https://travis-ci.org/hchauvin/bazel-coverage-report.svg?branch=master)](https://travis-ci.org/hchauvin/bazel-coverage-report)