diff --git a/app/spiffworkflow/extensions/propertiesPanel/SpiffExtensionServiceProperties.js b/app/spiffworkflow/extensions/propertiesPanel/SpiffExtensionServiceProperties.js
index 0e47eae..665caee 100644
--- a/app/spiffworkflow/extensions/propertiesPanel/SpiffExtensionServiceProperties.js
+++ b/app/spiffworkflow/extensions/propertiesPanel/SpiffExtensionServiceProperties.js
@@ -141,6 +141,7 @@ export function ServiceTaskOperatorSelect(props) {
     });
     newExtensionValues.push(newServiceTaskOperatorModdleElement);
     extensions.values = newExtensionValues;
+    businessObject.extensionElements = extensions;
 
     commandStack.execute('element.updateModdleProperties', {
       element,