Update to reflect 3.8.4 release notes.
diff --git a/activemq-cpp/RELEASE_NOTES.txt b/activemq-cpp/RELEASE_NOTES.txt
index 990452e..4fc85ed 100644
--- a/activemq-cpp/RELEASE_NOTES.txt
+++ b/activemq-cpp/RELEASE_NOTES.txt
@@ -3,6 +3,24 @@
=========================================================================
=========================================================================
+== Release Notes for ActiveMQ CPP 3.8.4 ==
+=========================================================================
+
+Bug
+
+ [AMQCPP-534] - Closing connection with setTransportListener to NULL may cause core dump
+ [AMQCPP-549] - Potential memory leak in consumer when delivering delayed ack.
+ [AMQCPP-550] - CMS (C++ client) crashed if getLocalHost failed
+ [AMQCPP-551] - EOFException when sending char in MapMessage between Java and C++
+ [AMQCPP-556] - setMessageListener on active session may leads to deadlock
+ [AMQCPP-558] - Port fix for AMQ-5513
+
+Improvement
+
+ [AMQCPP-548] - Too many temporary std::string in Mutex and decaf::lang::Integer::toString(int)
+ [AMQCPP-562] - Reduce memory delete and allocation in ArrayList
+
+=========================================================================
== Release Notes for ActiveMQ CPP 3.8.3 ==
=========================================================================
