diff --git a/libpaket/README.md b/libpaket/README.md
index 526059f..4f0dbcf 100644
--- a/libpaket/README.md
+++ b/libpaket/README.md
@@ -10,6 +10,13 @@ This is an unofficial client to various DHL APIs, more specific the ones that th
 
 - app-driven parcel lockers (App-gesteuerte Packstation)
 
+## Deprecation notice
+
+It's recommended that consumers of this crate are always tracking the latest version. If the upstream API changes too much or a better API here is created, there are two ways to mark a function or struct deprecated:
+
+- Soft deprecation/Crate API changes: The normal deprecation notice via `#[deprecated]` (see the [RFC#1270](https://github.com/rust-lang/rfcs/blob/master/text/1270-deprecation.md) or the [rust reference docs](https://doc.rust-lang.org/reference/attributes/diagnostics.html)).
+- (Fatal) Upstream API Changes: The soft deprecation marked with `deny(deprecated)`, you can try to override this, but functions with a `LibraryResult` will always return `LibraryError::Deprecated`. (NOTE: `LibrarayError::APIChange` is reserved for the case where the API-change is unknown. Please upgrade to a or wait for a newer crate version.)
+
 ## Examples
 
 In the examples error-handling is ignored for simplicity. You don’t want to do that.