diff --git a/README.md b/README.md
index 4240d198..9cbc3aa2 100644
--- a/README.md
+++ b/README.md
@@ -7,6 +7,11 @@

+> [!WARNING]
+> Motor will be deprecated on May 14th, 2026, one year after the production release of the PyMongo Async driver.
+> We strongly recommend that Motor users migrate to the PyMongo Async driver while Motor is still supported.
+> To learn more, see the migration guide: https://www.mongodb.com/docs/languages/python/pymongo-driver/current/reference/migration/.
+
## About
Motor is a full-featured, non-blocking [MongoDB](http://mongodb.org/)
diff --git a/doc/api-asyncio/aiohttp.rst b/doc/api-asyncio/aiohttp.rst
index 8e4c305d..adadf2be 100644
--- a/doc/api-asyncio/aiohttp.rst
+++ b/doc/api-asyncio/aiohttp.rst
@@ -1,6 +1,10 @@
:mod:`motor.aiohttp` - Integrate Motor with the aiohttp web framework
=====================================================================
+.. warning:: Motor will be deprecated on May 14th, 2026, one year after the production release of the PyMongo Async driver.
+ We strongly recommend that Motor users migrate to the PyMongo Async driver while Motor is still supported.
+ To learn more, see `the migration guide `_.
+
.. currentmodule:: motor.aiohttp
.. automodule:: motor.aiohttp
diff --git a/doc/api-asyncio/asyncio_gridfs.rst b/doc/api-asyncio/asyncio_gridfs.rst
index 28ca5f1f..f1d9bc42 100644
--- a/doc/api-asyncio/asyncio_gridfs.rst
+++ b/doc/api-asyncio/asyncio_gridfs.rst
@@ -1,6 +1,10 @@
asyncio GridFS Classes
======================
+.. warning:: Motor will be deprecated on May 14th, 2026, one year after the production release of the PyMongo Async driver.
+ We strongly recommend that Motor users migrate to the PyMongo Async driver while Motor is still supported.
+ To learn more, see `the migration guide `_.
+
.. currentmodule:: motor.motor_asyncio
Store blobs of data in `GridFS `_.
diff --git a/doc/api-asyncio/asyncio_motor_change_stream.rst b/doc/api-asyncio/asyncio_motor_change_stream.rst
index ba81f323..0cd30956 100644
--- a/doc/api-asyncio/asyncio_motor_change_stream.rst
+++ b/doc/api-asyncio/asyncio_motor_change_stream.rst
@@ -1,6 +1,10 @@
:class:`~motor.motor_asyncio.AsyncIOMotorChangeStream`
======================================================
+.. warning:: Motor will be deprecated on May 14th, 2026, one year after the production release of the PyMongo Async driver.
+ We strongly recommend that Motor users migrate to the PyMongo Async driver while Motor is still supported.
+ To learn more, see `the migration guide `_.
+
.. currentmodule:: motor.motor_asyncio
.. autoclass:: AsyncIOMotorChangeStream
diff --git a/doc/api-asyncio/asyncio_motor_client.rst b/doc/api-asyncio/asyncio_motor_client.rst
index 375a7f76..b8fc9632 100644
--- a/doc/api-asyncio/asyncio_motor_client.rst
+++ b/doc/api-asyncio/asyncio_motor_client.rst
@@ -1,6 +1,10 @@
:class:`~motor.motor_asyncio.AsyncIOMotorClient` -- Connection to MongoDB
=========================================================================
+.. warning:: Motor will be deprecated on May 14th, 2026, one year after the production release of the PyMongo Async driver.
+ We strongly recommend that Motor users migrate to the PyMongo Async driver while Motor is still supported.
+ To learn more, see `the migration guide `_.
+
.. autoclass:: motor.motor_asyncio.AsyncIOMotorClient
:members:
diff --git a/doc/api-asyncio/asyncio_motor_client_encryption.rst b/doc/api-asyncio/asyncio_motor_client_encryption.rst
index 19c671af..4a6a9258 100644
--- a/doc/api-asyncio/asyncio_motor_client_encryption.rst
+++ b/doc/api-asyncio/asyncio_motor_client_encryption.rst
@@ -1,6 +1,10 @@
:class:`~motor.motor_asyncio.AsyncIOMotorClientEncryption`
==========================================================
+.. warning:: Motor will be deprecated on May 14th, 2026, one year after the production release of the PyMongo Async driver.
+ We strongly recommend that Motor users migrate to the PyMongo Async driver while Motor is still supported.
+ To learn more, see `the migration guide `_.
+
.. currentmodule:: motor.motor_asyncio
.. autoclass:: AsyncIOMotorClientEncryption
diff --git a/doc/api-asyncio/asyncio_motor_client_session.rst b/doc/api-asyncio/asyncio_motor_client_session.rst
index e99c126a..6be54f51 100644
--- a/doc/api-asyncio/asyncio_motor_client_session.rst
+++ b/doc/api-asyncio/asyncio_motor_client_session.rst
@@ -1,5 +1,9 @@
:class:`~motor.motor_asyncio.AsyncIOMotorClientSession` -- Sequence of operations
=================================================================================
+.. warning:: Motor will be deprecated on May 14th, 2026, one year after the production release of the PyMongo Async driver.
+ We strongly recommend that Motor users migrate to the PyMongo Async driver while Motor is still supported.
+ To learn more, see `the migration guide `_.
+
.. autoclass:: motor.motor_asyncio.AsyncIOMotorClientSession
:members:
diff --git a/doc/api-asyncio/asyncio_motor_collection.rst b/doc/api-asyncio/asyncio_motor_collection.rst
index cddde0e2..9460cd39 100644
--- a/doc/api-asyncio/asyncio_motor_collection.rst
+++ b/doc/api-asyncio/asyncio_motor_collection.rst
@@ -1,6 +1,10 @@
:class:`~motor.motor_asyncio.AsyncIOMotorCollection`
====================================================
+.. warning:: Motor will be deprecated on May 14th, 2026, one year after the production release of the PyMongo Async driver.
+ We strongly recommend that Motor users migrate to the PyMongo Async driver while Motor is still supported.
+ To learn more, see `the migration guide `_.
+
.. currentmodule:: motor.motor_asyncio
.. autoclass:: AsyncIOMotorCollection
diff --git a/doc/api-asyncio/asyncio_motor_database.rst b/doc/api-asyncio/asyncio_motor_database.rst
index 02a43d7e..c8bb7d8a 100644
--- a/doc/api-asyncio/asyncio_motor_database.rst
+++ b/doc/api-asyncio/asyncio_motor_database.rst
@@ -1,6 +1,10 @@
:class:`~motor.motor_asyncio.AsyncIOMotorDatabase`
==================================================
+.. warning:: Motor will be deprecated on May 14th, 2026, one year after the production release of the PyMongo Async driver.
+ We strongly recommend that Motor users migrate to the PyMongo Async driver while Motor is still supported.
+ To learn more, see `the migration guide `_.
+
.. currentmodule:: motor.motor_asyncio
.. autoclass:: AsyncIOMotorDatabase
diff --git a/doc/api-asyncio/cursors.rst b/doc/api-asyncio/cursors.rst
index 796e8cfb..ec0f8da8 100644
--- a/doc/api-asyncio/cursors.rst
+++ b/doc/api-asyncio/cursors.rst
@@ -1,6 +1,10 @@
:class:`~motor.motor_asyncio.AsyncIOMotorCursor`
================================================
+.. warning:: Motor will be deprecated on May 14th, 2026, one year after the production release of the PyMongo Async driver.
+ We strongly recommend that Motor users migrate to the PyMongo Async driver while Motor is still supported.
+ To learn more, see `the migration guide `_.
+
.. currentmodule:: motor.motor_asyncio
.. autoclass:: AsyncIOMotorCursor
diff --git a/doc/api-asyncio/index.rst b/doc/api-asyncio/index.rst
index f4ad4c3d..c22fb108 100644
--- a/doc/api-asyncio/index.rst
+++ b/doc/api-asyncio/index.rst
@@ -1,6 +1,10 @@
Motor asyncio API
=================
+.. warning:: Motor will be deprecated on May 14th, 2026, one year after the production release of the PyMongo Async driver.
+ We strongly recommend that Motor users migrate to the PyMongo Async driver while Motor is still supported.
+ To learn more, see `the migration guide `_.
+
.. toctree::
asyncio_motor_client
diff --git a/doc/api-tornado/cursors.rst b/doc/api-tornado/cursors.rst
index 9d136e0d..de5a9fae 100644
--- a/doc/api-tornado/cursors.rst
+++ b/doc/api-tornado/cursors.rst
@@ -1,6 +1,10 @@
:class:`~motor.motor_tornado.MotorCursor`
=========================================
+.. warning:: Motor will be deprecated on May 14th, 2026, one year after the production release of the PyMongo Async driver.
+ We strongly recommend that Motor users migrate to the PyMongo Async driver while Motor is still supported.
+ To learn more, see `the migration guide `_.
+
.. currentmodule:: motor.motor_tornado
.. autoclass:: MotorCursor
diff --git a/doc/api-tornado/gridfs.rst b/doc/api-tornado/gridfs.rst
index a83bcac0..342608e1 100644
--- a/doc/api-tornado/gridfs.rst
+++ b/doc/api-tornado/gridfs.rst
@@ -1,6 +1,10 @@
Motor GridFS Classes
====================
+.. warning:: Motor will be deprecated on May 14th, 2026, one year after the production release of the PyMongo Async driver.
+ We strongly recommend that Motor users migrate to the PyMongo Async driver while Motor is still supported.
+ To learn more, see `the migration guide `_.
+
.. currentmodule:: motor.motor_tornado
Store blobs of data in `GridFS `_.
diff --git a/doc/api-tornado/index.rst b/doc/api-tornado/index.rst
index 038ba488..a9dea0b5 100644
--- a/doc/api-tornado/index.rst
+++ b/doc/api-tornado/index.rst
@@ -1,6 +1,10 @@
Motor Tornado API
=================
+.. warning:: Motor will be deprecated on May 14th, 2026, one year after the production release of the PyMongo Async driver.
+ We strongly recommend that Motor users migrate to the PyMongo Async driver while Motor is still supported.
+ To learn more, see `the migration guide `_.
+
.. toctree::
motor_client
diff --git a/doc/api-tornado/motor_change_stream.rst b/doc/api-tornado/motor_change_stream.rst
index 25571864..9aa33395 100644
--- a/doc/api-tornado/motor_change_stream.rst
+++ b/doc/api-tornado/motor_change_stream.rst
@@ -1,6 +1,10 @@
:class:`~motor.motor_tornado.MotorChangeStream`
===============================================
+.. warning:: Motor will be deprecated on May 14th, 2026, one year after the production release of the PyMongo Async driver.
+ We strongly recommend that Motor users migrate to the PyMongo Async driver while Motor is still supported.
+ To learn more, see `the migration guide `_.
+
.. currentmodule:: motor.motor_tornado
.. autoclass:: MotorChangeStream
diff --git a/doc/api-tornado/motor_client.rst b/doc/api-tornado/motor_client.rst
index 1ebfacbb..878da84e 100644
--- a/doc/api-tornado/motor_client.rst
+++ b/doc/api-tornado/motor_client.rst
@@ -1,6 +1,10 @@
:class:`~motor.motor_tornado.MotorClient` -- Connection to MongoDB
==================================================================
+.. warning:: Motor will be deprecated on May 14th, 2026, one year after the production release of the PyMongo Async driver.
+ We strongly recommend that Motor users migrate to the PyMongo Async driver while Motor is still supported.
+ To learn more, see `the migration guide `_.
+
.. currentmodule:: motor.motor_tornado
.. autoclass:: MotorClient
diff --git a/doc/api-tornado/motor_client_encryption.rst b/doc/api-tornado/motor_client_encryption.rst
index e6222681..e5ae62bd 100644
--- a/doc/api-tornado/motor_client_encryption.rst
+++ b/doc/api-tornado/motor_client_encryption.rst
@@ -1,6 +1,10 @@
:class:`~motor.motor_tornado.MotorClientEncryption`
===================================================
+.. warning:: Motor will be deprecated on May 14th, 2026, one year after the production release of the PyMongo Async driver.
+ We strongly recommend that Motor users migrate to the PyMongo Async driver while Motor is still supported.
+ To learn more, see `the migration guide `_.
+
.. currentmodule:: motor.motor_tornado
.. autoclass:: MotorClientEncryption
diff --git a/doc/api-tornado/motor_client_session.rst b/doc/api-tornado/motor_client_session.rst
index 66b43d32..7c31b5ae 100644
--- a/doc/api-tornado/motor_client_session.rst
+++ b/doc/api-tornado/motor_client_session.rst
@@ -1,6 +1,10 @@
:class:`~motor.motor_tornado.MotorClientSession` -- Sequence of operations
==========================================================================
+.. warning:: Motor will be deprecated on May 14th, 2026, one year after the production release of the PyMongo Async driver.
+ We strongly recommend that Motor users migrate to the PyMongo Async driver while Motor is still supported.
+ To learn more, see `the migration guide `_.
+
.. currentmodule:: motor.motor_tornado
.. autoclass:: motor.motor_tornado.MotorClientSession
diff --git a/doc/api-tornado/motor_collection.rst b/doc/api-tornado/motor_collection.rst
index d077c488..c9b1e456 100644
--- a/doc/api-tornado/motor_collection.rst
+++ b/doc/api-tornado/motor_collection.rst
@@ -1,6 +1,10 @@
:class:`~motor.motor_tornado.MotorCollection`
=============================================
+.. warning:: Motor will be deprecated on May 14th, 2026, one year after the production release of the PyMongo Async driver.
+ We strongly recommend that Motor users migrate to the PyMongo Async driver while Motor is still supported.
+ To learn more, see `the migration guide `_.
+
.. currentmodule:: motor.motor_tornado
.. autoclass:: MotorCollection
diff --git a/doc/api-tornado/motor_database.rst b/doc/api-tornado/motor_database.rst
index 41db522c..a32e4430 100644
--- a/doc/api-tornado/motor_database.rst
+++ b/doc/api-tornado/motor_database.rst
@@ -1,6 +1,10 @@
:class:`~motor.motor_tornado.MotorDatabase`
===========================================
+.. warning:: Motor will be deprecated on May 14th, 2026, one year after the production release of the PyMongo Async driver.
+ We strongly recommend that Motor users migrate to the PyMongo Async driver while Motor is still supported.
+ To learn more, see `the migration guide `_.
+
.. currentmodule:: motor.motor_tornado
.. autoclass:: MotorDatabase
diff --git a/doc/api-tornado/web.rst b/doc/api-tornado/web.rst
index 622067ea..60624215 100644
--- a/doc/api-tornado/web.rst
+++ b/doc/api-tornado/web.rst
@@ -1,6 +1,10 @@
:mod:`motor.web` - Integrate Motor with the Tornado web framework
=================================================================
+.. warning:: Motor will be deprecated on May 14th, 2026, one year after the production release of the PyMongo Async driver.
+ We strongly recommend that Motor users migrate to the PyMongo Async driver while Motor is still supported.
+ To learn more, see `the migration guide `_.
+
.. currentmodule:: motor.web
.. automodule:: motor.web
diff --git a/doc/changelog.rst b/doc/changelog.rst
index c77ab78e..d024b7fd 100644
--- a/doc/changelog.rst
+++ b/doc/changelog.rst
@@ -1,6 +1,11 @@
Changelog
=========
+.. warning:: Motor will be deprecated on May 14th, 2026, one year after the production release of the PyMongo Async driver.
+ We strongly recommend that Motor users migrate to the PyMongo Async driver while Motor is still supported.
+ To learn more, see `the migration guide `_.
+
+
.. currentmodule:: motor.motor_tornado
Motor 3.7.0
diff --git a/doc/configuration.rst b/doc/configuration.rst
index 9605c854..5cb697e3 100644
--- a/doc/configuration.rst
+++ b/doc/configuration.rst
@@ -1,6 +1,11 @@
Configuration
=============
+.. warning:: Motor will be deprecated on May 14th, 2026, one year after the production release of the PyMongo Async driver.
+ We strongly recommend that Motor users migrate to the PyMongo Async driver while Motor is still supported.
+ To learn more, see `the migration guide `_.
+
+
TLS Protocol Version
''''''''''''''''''''
diff --git a/doc/developer-guide.rst b/doc/developer-guide.rst
index d4a045f1..ebf0ae98 100644
--- a/doc/developer-guide.rst
+++ b/doc/developer-guide.rst
@@ -2,6 +2,11 @@
Developer Guide
===============
+.. warning:: Motor will be deprecated on May 14th, 2026, one year after the production release of the PyMongo Async driver.
+ We strongly recommend that Motor users migrate to the PyMongo Async driver while Motor is still supported.
+ To learn more, see `the migration guide `_.
+
+
Some explanations for those who would like to contribute to Motor development.
Compatibility
diff --git a/doc/differences.rst b/doc/differences.rst
index 3e5a75e7..c992db18 100644
--- a/doc/differences.rst
+++ b/doc/differences.rst
@@ -4,6 +4,10 @@
Differences between Motor and PyMongo
=====================================
+.. warning:: Motor will be deprecated on May 14th, 2026, one year after the production release of the PyMongo Async driver.
+ We strongly recommend that Motor users migrate to the PyMongo Async driver while Motor is still supported.
+ To learn more, see `the migration guide `_.
+
.. important:: This page describes using Motor with Tornado. Beginning in
version 0.5 Motor can also integrate with asyncio instead of Tornado.
diff --git a/doc/features.rst b/doc/features.rst
index d028254e..5449d5a4 100644
--- a/doc/features.rst
+++ b/doc/features.rst
@@ -4,6 +4,11 @@ Motor Features
.. currentmodule:: motor.motor_tornado
+.. warning:: Motor will be deprecated on May 14th, 2026, one year after the production release of the PyMongo Async driver.
+ We strongly recommend that Motor users migrate to the PyMongo Async driver while Motor is still supported.
+ To learn more, see `the migration guide `_.
+
+
Non-Blocking
============
Motor is an asynchronous driver for MongoDB. It can be used from Tornado_ or
diff --git a/doc/index.rst b/doc/index.rst
index 0982c9a7..08e0797e 100644
--- a/doc/index.rst
+++ b/doc/index.rst
@@ -4,6 +4,10 @@ Motor: Asynchronous Python driver for MongoDB
.. image:: _static/motor.png
:align: center
+.. warning:: Motor will be deprecated on May 14th, 2026, one year after the production release of the PyMongo Async driver.
+ We strongly recommend that Motor users migrate to the PyMongo Async driver while Motor is still supported.
+ To learn more, see `the migration guide `_.
+
About
-----
diff --git a/doc/installation.rst b/doc/installation.rst
index 08fc229b..7a170a93 100644
--- a/doc/installation.rst
+++ b/doc/installation.rst
@@ -1,6 +1,11 @@
Installation
============
+.. warning:: Motor will be deprecated on May 14th, 2026, one year after the production release of the PyMongo Async driver.
+ We strongly recommend that Motor users migrate to the PyMongo Async driver while Motor is still supported.
+ To learn more, see `the migration guide `_.
+
+
Install Motor from PyPI_ with pip_::
$ python3 -m pip install motor
diff --git a/doc/migrate-to-motor-2.rst b/doc/migrate-to-motor-2.rst
index f90be847..9c135bcd 100644
--- a/doc/migrate-to-motor-2.rst
+++ b/doc/migrate-to-motor-2.rst
@@ -1,6 +1,11 @@
Motor 2.0 Migration Guide
=========================
+.. warning:: Motor will be deprecated on May 14th, 2026, one year after the production release of the PyMongo Async driver.
+ We strongly recommend that Motor users migrate to the PyMongo Async driver while Motor is still supported.
+ To learn more, see `the migration guide `_.
+
+
.. currentmodule:: motor.motor_tornado
Motor 2.0 brings a number of changes to Motor 1.0's API. The major version is
diff --git a/doc/migrate-to-motor-3.rst b/doc/migrate-to-motor-3.rst
index dd289320..6c731a65 100644
--- a/doc/migrate-to-motor-3.rst
+++ b/doc/migrate-to-motor-3.rst
@@ -1,6 +1,11 @@
Motor 3.0 Migration Guide
=========================
+.. warning:: Motor will be deprecated on May 14th, 2026, one year after the production release of the PyMongo Async driver.
+ We strongly recommend that Motor users migrate to the PyMongo Async driver while Motor is still supported.
+ To learn more, see `the migration guide `_.
+
+
.. currentmodule:: motor.motor_tornado
Motor 3.0 brings a number of changes to Motor 2.0's API. The major version is
diff --git a/doc/requirements.rst b/doc/requirements.rst
index afddeff0..7ccd4b44 100644
--- a/doc/requirements.rst
+++ b/doc/requirements.rst
@@ -1,6 +1,11 @@
Requirements
============
+.. warning:: Motor will be deprecated on May 14th, 2026, one year after the production release of the PyMongo Async driver.
+ We strongly recommend that Motor users migrate to the PyMongo Async driver while Motor is still supported.
+ To learn more, see `the migration guide `_.
+
+
The current version of Motor requires:
* CPython 3.9 and later.
diff --git a/doc/tutorial-asyncio.rst b/doc/tutorial-asyncio.rst
index 463d3d10..b6a5c09e 100644
--- a/doc/tutorial-asyncio.rst
+++ b/doc/tutorial-asyncio.rst
@@ -3,6 +3,11 @@
Tutorial: Using Motor With :mod:`asyncio`
=========================================
+.. warning:: Motor will be deprecated on May 14th, 2026, one year after the production release of the PyMongo Async driver.
+ We strongly recommend that Motor users migrate to the PyMongo Async driver while Motor is still supported.
+ To learn more, see `the migration guide `_.
+
+
.. These setups are redundant because I can't figure out how to make doctest
run a common setup *before* the setup for the two groups. A "testsetup:: *"
is the obvious answer, but it's run *after* group-specific setup.
@@ -454,8 +459,7 @@ to an :class:`aiohttp.web.Application`:
:start-after: main-start
:end-before: main-end
-.. warning::
- It is a common mistake to create a new client object for every request; this comes at a dire performance cost.
+.. warning:: It is a common mistake to create a new client object for every request; this comes at a dire performance cost.
Create the client when your application starts and reuse that one client for the lifetime of the process.
You can maintain the client by storing a database handle from the client on your application object, as shown in this example.
diff --git a/doc/tutorial-tornado.rst b/doc/tutorial-tornado.rst
index b51d3072..5afc23fc 100644
--- a/doc/tutorial-tornado.rst
+++ b/doc/tutorial-tornado.rst
@@ -3,6 +3,11 @@
Tutorial: Using Motor With Tornado
==================================
+.. warning:: Motor will be deprecated on May 14th, 2026, one year after the production release of the PyMongo Async driver.
+ We strongly recommend that Motor users migrate to the PyMongo Async driver while Motor is still supported.
+ To learn more, see `the migration guide `_.
+
+
.. These setups are redundant because I can't figure out how to make doctest
run a common setup *before* the setup for the two groups. A "testsetup:: *"
is the obvious answer, but it's run *after* group-specific setup.
@@ -152,8 +157,7 @@ makes it available to request handlers::
def get(self):
db = self.settings['db']
-.. warning::
- It is a common mistake to create a new client object for every
+.. warning:: It is a common mistake to create a new client object for every
request; **this comes at a dire performance cost**. Create the client
when your application starts and reuse that one client for the lifetime
of the process, as shown in these examples.