diff --git a/README.md b/README.md
index ce093d2..2ef3680 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,8 @@
 # NOTE
 
+While we do our best to keep the master branch in a usable state, there is no guarantee the master branch works.
+Please do not use it for production!
+
 Please have a look at the [Release
 Notes](https://github.com/ClusterCockpit/cc-backend/blob/master/ReleaseNotes.md)
 for breaking changes!