diff --git a/README.md b/README.md
index 07e0968..ec2a20d 100644
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+++ b/README.md
@@ -2,7 +2,8 @@
 
 CADS API Python client
 
-Technical documentation: https://ecmwf-projects.github.io/cads-api-client/
+> \[!WARNING\]
+> Deprecated in favour of https://github.com/ecmwf-projects/datapi
 
 ## Configuration