diff --git a/giskard_vision/object_detection/dataloaders/loaders.py b/giskard_vision/object_detection/dataloaders/loaders.py
index d34bbdb4..95fc343a 100644
--- a/giskard_vision/object_detection/dataloaders/loaders.py
+++ b/giskard_vision/object_detection/dataloaders/loaders.py
@@ -324,9 +324,15 @@ def get_meta(self, idx: int) -> Optional[Dict[str, Any]]:
             "faceRectangle_height",
         ]
         return MetaData(
-            data=meta.data + {k: v for k, v in meta.data.items() if k not in excludes},
+            data={
+                **meta.data,
+                **{k: v for k, v in meta.data.items() if k not in excludes},
+            },
             categories=meta.categories + [c for c in meta.categories if c not in excludes],
-            issue_groups=meta.issue_groups + {k: v for k, v in meta.issue_groups.items() if k not in excludes},
+            issue_groups={
+                **meta.issue_groups,
+                **{k: v for k, v in meta.issue_groups.items() if k not in excludes},
+            },
         )