diff --git a/tx/tho/expand-vs-act-class-response-valueSet.json b/tx/tho/expand-vs-act-class-response-valueSet.json
index 36851ca4..153d7808 100644
--- a/tx/tho/expand-vs-act-class-response-valueSet.json
+++ b/tx/tho/expand-vs-act-class-response-valueSet.json
@@ -1,5 +1,5 @@
 {
-  "$optional-properties$" : ["id"],
+  "$optional-properties$" : ["id","date"],
   "resourceType" : "ValueSet",
   "id" : "$id$",
   "url" : "http://hl7.org/fhir/tests/ValueSet/act-class",
@@ -712,4 +712,4 @@
       "code" : "unordered"
     }]
   }
-}
\ No newline at end of file
+}