diff --git a/alkemio_virtual_contributor_engine/events/response.py b/alkemio_virtual_contributor_engine/events/response.py
index 324fb26..4b87768 100644
--- a/alkemio_virtual_contributor_engine/events/response.py
+++ b/alkemio_virtual_contributor_engine/events/response.py
@@ -17,9 +17,7 @@ def __init__(self, source: Dict[str, str]):
         self.score = source.get("score")
         self.uri = source.get("uri")
 
-        if all(
-            [self.document_id, self.source, self.title, self.type, self.score, self.uri]
-        ):
+        if not all([self.uri]):
             raise ValueError("Missing required fields in source dictionary")
 
     def to_dict(self):