diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -2,3 +2,5 @@
 Nextcloud extension to support WebDAV-Push on calendars/address books
 
 This repo is intended as a sample implementation of [https://github.com/bitfireAT/webdav-push/](WebDAV-Push) for Nextcloud calendars and address books.
+
+If there's anything in this repo, it's highly experimental and not usable yet.