diff --git a/CHANGELOG.md b/CHANGELOG.md
index ab10a8d..621b573 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,8 +1,10 @@
 # Changelog
 Newest updates are at the top of this file.
 
-## xxx xx 2021 - v5.xxx
+## Aug 03 2021 - v5.2.1
+* Update for MQ 9.2.3
 * Add a sample amqsbo.go to show how to deal with poison messages
+* samples - Containerised sample turned into multi-stage Dockerfile to reduce size of deployed app container
 
 ## Mar 25 2021 - v5.2.0 
 Scope of mqmetric changes seem to justify new minor number
diff --git a/Dockerfile b/Dockerfile
index d111c3a..e505932 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -58,7 +58,7 @@ RUN mkdir -p $GOPATH/src $GOPATH/bin $GOPATH/pkg \
 # Location of the downloadable MQ client package \
 ENV RDURL="https://public.dhe.ibm.com/ibmdl/export/pub/software/websphere/messaging/mqdev/redist" \
     RDTAR="IBM-MQC-Redist-LinuxX64.tar.gz" \
-    VRMF=9.2.2.0
+    VRMF=9.2.3.0
 
 # Install the MQ client from the Redistributable package. This also contains the
 # header files we need to compile against. Setup the subset of the package