diff --git a/src/backend/langflow/api/v1/validate.py b/src/backend/langflow/api/v1/validate.py
index 431945602..64e2b9c98 100644
--- a/src/backend/langflow/api/v1/validate.py
+++ b/src/backend/langflow/api/v1/validate.py
@@ -38,7 +38,10 @@ def post_validate_prompt(prompt: ValidatePromptRequest):
         for variable in input_variables:
             try:
                 template_field = TemplateField(
-                    name=variable, field_type="str", show=True, advanced=False
+                    name=variable,
+                    field_type="str",
+                    show=True,
+                    advanced=False,
                 )
 
                 prompt.frontend_node.template[variable] = template_field.to_dict()