diff --git a/README.md b/README.md
index aa08234..110eada 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,11 @@
 ![occweb](https://git.adphi.net/Adphi/OCCWeb/raw/master/appinfo/screenshot.png)
 
 
+## ⚠️ Deprerecated ⚠️
+As nextcloudd has no native support for asynchronous operations, due to the use of php, this aplication is deprecated, and will not support the Nextcloud future versions (19+). There is no possibilities to implemement true support for interactive and long running occ tasks in a web terminal (for example through websockets), which can lead to serious alterations of voluminous instances. 
+[This issue](https://github.com/nextcloud/server/issues/16726) may give some hints on why I decided to not support this application anymore.
+
+
 ## Install
 
 Place this app in **nextcloud/apps/**
@@ -13,7 +18,7 @@ Place this app in **nextcloud/apps/**
 
 - The application is not a real interactive terminal and does not support long running tasks. 
 So if your instance is pretty big, commands like `occ files:scan` will time out and fail.
-- Do not use `occ maintenance:mode -on`, obvious...
+- Do not use `occ maintenance:mode --on`, obvious...
 
 ## TODOs:
 See [open issues](https://git.adphi.net/Adphi/OCCWeb/issues)