diff --git a/modules/activiti-bpmn-converter/src/main/resources/org/activiti/impl/bpmn/parser/activiti-bpmn-extensions-5.15.xsd b/modules/activiti-bpmn-converter/src/main/resources/org/activiti/impl/bpmn/parser/activiti-bpmn-extensions-5.15.xsd
index 593d98425b8aa27749eefe26c9f82abe2be8bb2f..282c977be90a0a017d71d802f318e51c6f6efc7d 100644
--- a/modules/activiti-bpmn-converter/src/main/resources/org/activiti/impl/bpmn/parser/activiti-bpmn-extensions-5.15.xsd
+++ b/modules/activiti-bpmn-converter/src/main/resources/org/activiti/impl/bpmn/parser/activiti-bpmn-extensions-5.15.xsd
@@ -220,6 +220,9 @@
     </annotation>
     <simpleType>
       <restriction base="string">
+        <enumeration value="camel"/>
+        <enumeration value="mail"/>
+        <enumeration value="mule"/>
         <enumeration value="shell"/>
       </restriction>
     </simpleType>