diff --git a/README.md b/README.md
index fa9f6be..e900ac9 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,6 @@
+> [!WARNING]
+> **This package is deprecated.** Please migrate to the unified Polymarket SDK. Follow the [migration guide](https://docs.polymarket.com/migrate/clob-sdk-to-unified-sdk) to get started.
+
 # py-builder-relayer-client
 
 Python client library for interacting with the Polymarket Relayer infrastructure