diff --git a/cyclonedx/model/vulnerability.py b/cyclonedx/model/vulnerability.py
index eadf1e64..f2eb1a7f 100644
--- a/cyclonedx/model/vulnerability.py
+++ b/cyclonedx/model/vulnerability.py
@@ -337,7 +337,10 @@ def last_updated(self, last_updated: Optional[datetime]) -> None:
 
     def __comparable_tuple(self) -> _ComparableTuple:
         return _ComparableTuple((
-            self.state, self.justification, tuple(self.responses), self.detail, self.first_issued, self.last_updated
+            self.state, self.justification,
+            _ComparableTuple(self.responses),
+            self.detail,
+            self.first_issued, self.last_updated
         ))
 
     def __eq__(self, other: object) -> bool: