--- a/mod_muc_media_metadata/README.markdown	Fri Sep 11 14:43:12 2020 +0100
+++ b/mod_muc_media_metadata/README.markdown	Fri Sep 11 15:45:45 2020 +0200
@@ -10,9 +10,11 @@
 make decisions and provide better UI and enhanced privacy, by knowing things like file
 size without needing to make external network requests.
 
+::: {.alert .alert-danger}
 **NOTE:** This is an experimental module. It is not supported by any
 clients, and therefore is mainly of interest to client developers who
 wish to explore the idea.
+:::
 
 # Configuring