diff --git a/README.md b/README.md
index 4bfce7d..cc6b394 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,7 @@
+> [!WARNING]
+> **DEPRECATION NOTICE**: 
+> * EventStoreDB version 23.10.x is the last OSS version to support the tcp protocol based client.
+
 EventStore Haskell TCP client
 =============================