diff --git a/spring-integration-mqtt/README.md b/spring-integration-mqtt/README.md
index 5951498..7bd37bb 100644
--- a/spring-integration-mqtt/README.md
+++ b/spring-integration-mqtt/README.md
@@ -3,6 +3,15 @@ Spring Integration MQTT Support
 
 `inbound` and `outbound` channel adapters are provided for [MQ Telemetry Transport (MQTT)][]. The current implementation uses the [Eclipse Paho][] client.
 
+__Note:__ Starting with version 4.0.0, this module has been moved to the main [Spring Integration][] project.
+
+This extension project has essentially the same features, more fully documented in the [main project documentation][] and is compatible with Spring Integration 3.0.x and 2.2.x.
+
+Currently, the release candidate for the extension is 1.0.0.RC1 and will be released soon.
+
+[Spring Integration]:https://github.com/spring-projects/spring-integration
+[main project documentation]:http://docs.spring.io/spring-integration/docs/4.0.0.BUILD-SNAPSHOT/reference/html/mqtt.html
+
 ## Example Configurations
 
 ```xml
@@ -83,4 +92,4 @@ For more information, please also don't forget to visit the [Spring Integration]
 [Stack Overflow]: http://stackoverflow.com/faq
 [Eclipse Paho]: http://www.eclipse.org/paho/
 [open paho bug]: https://bugs.eclipse.org/bugs/show_bug.cgi?id=382471
-[MQ Telemetry Transport (MQTT)]: http://mqtt.org/
\ No newline at end of file
+[MQ Telemetry Transport (MQTT)]: http://mqtt.org/