diff --git a/bioblend/galaxy/dataset_collections/__init__.py b/bioblend/galaxy/dataset_collections/__init__.py
index addd84a32..e1dff9b20 100644
--- a/bioblend/galaxy/dataset_collections/__init__.py
+++ b/bioblend/galaxy/dataset_collections/__init__.py
@@ -33,7 +33,7 @@ def __init__(
         self.name = name
         self.type = type
         if isinstance(elements, dict):
-            self.elements: List[Union["CollectionElement", "SimpleElement"]] = [
+            self.elements: List[Union[CollectionElement, SimpleElement]] = [
                 HistoryDatasetElement(name=key, id=value) for key, value in elements.values()
             ]
         elif elements: