diff --git a/doc/source/serve/index.rst b/doc/source/serve/index.rst
index f15093b6c..d5c6853df 100644
--- a/doc/source/serve/index.rst
+++ b/doc/source/serve/index.rst
@@ -1,3 +1,7 @@
+.. warning::
+  Ray Serve is changing fast!  You're probably running the latest pip release and not the nightly build, so please ensure you're viewing the correct version of this documentation.
+  `Here's the documentation for the latest pip release of Ray Serve <https://docs.ray.io/en/latest/serve/index.html>`_.
+
 .. _rayserve:
 
 ============================================