diff --git a/README.md b/README.md
index fdcd46c..faa579c 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,5 @@
+**Warning:** Starting the _runall.py_ script directly can severely damage your system by running random Bash commands. Please start it in a container as described below.
+
 How to run:
 
 ```