diff --git a/spiffworkflow-backend/src/spiffworkflow_backend/models/task.py b/spiffworkflow-backend/src/spiffworkflow_backend/models/task.py
index 302df25ac..b35c87598 100644
--- a/spiffworkflow-backend/src/spiffworkflow_backend/models/task.py
+++ b/spiffworkflow-backend/src/spiffworkflow_backend/models/task.py
@@ -55,7 +55,7 @@ class TaskModel(SpiffworkflowBaseDBModel):
     json_data_hash: str = db.Column(db.String(255), nullable=False, index=True)
 
     start_in_seconds: float = db.Column(db.DECIMAL(17, 6))
-    end_in_seconds: float | None = db.Column(db.DECIMAL(17, 6))
+    end_in_seconds: Union[float, None] = db.Column(db.DECIMAL(17, 6))
 
 
 class Task: