diff --git a/README.md b/README.md
index c65cc3c..2bd9f0d 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,8 @@
 
 This is a simple Docker container for running [marp-ui](https://codeberg.org/ric_harvey/marp-ui).
 
-** Warning **
+**+++ Warning +++**
+
 Run marp-ui only in a local environment or behind some authentication system, eg. using a reverse
 proxy with authentication function!