diff --git a/owilix/core/metadata.py b/owilix/core/metadata.py
index fb97e84..e6630eb 100644
--- a/owilix/core/metadata.py
+++ b/owilix/core/metadata.py
@@ -1476,9 +1476,10 @@ class DatasetMetadata:
 
     def as_json_dict(self, version=None):
         version = version or self.default_version
-        if version=="datacite.V1":
+        if version=="datacite.V1" or version=="V1":
             # we might need to consider the format. So first get teh containers from the internal entries, which should give a {datacite:{key:value}} structure
-            _dict_of_datacites = {k:v.to_json_dict(version) for k,v in self.metadata_entries.items()
+            _convert_to = version if version!="V1" else "datacite.V1"
+            _dict_of_datacites = {k:v.to_json_dict(_convert_to) for k,v in self.metadata_entries.items()
                         if isinstance(v,MetadataField)}
             _returns={"datacite": {}}
             for _dict in _dict_of_datacites.values():