diff --git a/playground/matplus/the-cancel-process/the-cancel-process.bpmn b/playground/matplus/the-cancel-process/the-cancel-process.bpmn
index 7e95af71..de87b445 100644
--- a/playground/matplus/the-cancel-process/the-cancel-process.bpmn
+++ b/playground/matplus/the-cancel-process/the-cancel-process.bpmn
@@ -7,7 +7,7 @@
     <bpmn:startEvent id="StartEvent_1">
       <bpmn:outgoing>Flow_17db3yp</bpmn:outgoing>
     </bpmn:startEvent>
-    <bpmn:sendTask id="Activity_0qpzdpu" name="Example manual task">
+    <bpmn:sendTask id="Activity_0qpzdpu" name="Example manual task" messageRef="Message_0yv6l3l">
       <bpmn:extensionElements>
         <spiffworkflow:instructionsForEndUser>This is an example **Manual Task**. A **Manual Task** is designed to allow someone to complete a task outside of the system and then report back that it is complete. You can click the *Continue* button to proceed. When you are done running this process, you can edit the **Process Model** to include a: