diff --git a/README.md b/README.md
index f1dc95f66ec16f90fb89833a8e83401f78fd3eea..4e52c058345423199e715db4dd64dab36d5e203c 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@ The room should be ventilated as soon as one LED turns red.
 
 Ampel-firmware + [IotWebConf](https://github.com/prampec/IotWebConf).
 
-This is beta software, and bugs are expected!
+This is beta software, and bugs are expected! There is not much free RAM left on ESP8266, so the ESP might crash randomly. :-/
 
 * You probably need to update `config.h`. There's a new template in `config.public.h`.
 * Every parameter can be set in the web-configuration, so you don't have to modify `config.h` once it's been updated.