diff --git a/api/models/workflow.py b/api/models/workflow.py
index 64b0e16577..b0cb8dccd9 100644
--- a/api/models/workflow.py
+++ b/api/models/workflow.py
@@ -199,7 +199,9 @@ class Workflow(Base):
             features["file_upload"]["number_limits"] = image_number_limits
             features["file_upload"]["allowed_file_upload_methods"] = image_transfer_methods
             features["file_upload"]["allowed_file_types"] = features["file_upload"].get("allowed_file_types", ["image"])
-            features["file_upload"]["allowed_file_extensions"] = []
+            features["file_upload"]["allowed_file_extensions"] = features["file_upload"].get(
+                "allowed_file_extensions", []
+            )
             del features["file_upload"]["image"]
             self._features = json.dumps(features)
         return self._features