diff --git a/ai_ta_backend/flows.py b/ai_ta_backend/flows.py
index 4c79956f..70380ccc 100644
--- a/ai_ta_backend/flows.py
+++ b/ai_ta_backend/flows.py
@@ -141,7 +141,7 @@ def format_data(self, inputted, api_key: str, workflow_name):
       data[value['fieldLabel']] = field_name
     new_data = {}
     for k, v in inputted.items():
-      if type(v) == list:
+      if isinstance(v, list):
         new_data[data[k]] = json.dumps(v)
       else:
         new_data[data[k]] = v