diff --git a/src/backend/langflow/api/v1/validate.py b/src/backend/langflow/api/v1/validate.py
index 36870af35..9878376c7 100644
--- a/src/backend/langflow/api/v1/validate.py
+++ b/src/backend/langflow/api/v1/validate.py
@@ -71,7 +71,7 @@ def add_new_variables_to_template(input_variables, prompt_request):
                 field_type="str",
                 show=True,
                 advanced=False,
-                input_types=["BaseLoader", "BaseOutputParser"],
+                input_types=["Document", "BaseOutputParser"],
             )
 
             prompt_request.frontend_node.template[variable] = template_field.to_dict()