diff --git a/Notify_mqtt.md b/Notify_mqtt.md
index e4a4ab1..ee091f7 100644
--- a/Notify_mqtt.md
+++ b/Notify_mqtt.md
@@ -35,6 +35,7 @@ Secure connections should be referenced using **mqtts://** where as insecure con
 | version       | No       |  The MQTT Protocol Version to use.  By default this is set to **v3.1.1**. The other possible values are **v3.1** and **v5**.
 | client_id     | No      | The MQTT client identifier to use when establishing a connection with the server.  By default this is not set and a unique ID is generated per message.
 | session     | No      | The MQTT session to maintain (associated with the client_id).  If no client_id is specified, then this value is not considered.  By default there is no session established and each connection made by apprise is unique.  If you wish to enforce a session (associated with a provided client_id) then set this value to True.
+| retain     | No      | The MQTT publisher retain flag.  By default this is set to `no`, but you may optionally over-ride it and set it to `yes`
 
 ### Example
 ```bash
@@ -67,4 +68,7 @@ docker run --name mosquitto -p 1883:1883 \
 
 # All apprise testing can be done against this systems IP such as:
 # apprise -vvv -b "my=payload" mqtt://localhost/a/simple/topic
+
+# Here is an example where the 'retain' flag is set:
+ apprise -vvv -b "my=payload" mqtt://localhost/a/simple/topic?retain=yes
 ```
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