diff --git a/deployment_manifest_schema.json b/deployment_manifest_schema.json
index 6f7daaf..8e56b93 100644
--- a/deployment_manifest_schema.json
+++ b/deployment_manifest_schema.json
@@ -41,6 +41,11 @@
                   "type": "string",
                   "pattern": "^([a-zA-Z]|_[a-zA-Z0-9])[a-zA-Z0-9_]*$"
                 },
+                "handlerType": {
+                  "title": "HandlerType",
+                  "enum": ["EXCLUSIVE", "SHARED"],
+                  "description": "If unspecified, defaults to EXCLUSIVE for Virtual Object. This should be unset for Services."
+                },
                 "input": {
                   "type": "object",
                   "title": "InputPayload",