diff --git a/schema/forms_archetype.yaml b/schema/forms_archetype.yaml
index 80c9355..bda9552 100644
--- a/schema/forms_archetype.yaml
+++ b/schema/forms_archetype.yaml
@@ -1,4 +1,5 @@
 creation_date: day(min='1990-01-01')
+version: any(str(), num())
 exporting_software:
   name: str()
   version: any(str(), num())