diff --git a/infrastructure/stacks/postcode_etl/functions/uec-sf-postcode-insert/postcode_insert.py b/infrastructure/stacks/postcode_etl/functions/uec-sf-postcode-insert/postcode_insert.py
index c7b6e33c..8381cc2a 100644
--- a/infrastructure/stacks/postcode_etl/functions/uec-sf-postcode-insert/postcode_insert.py
+++ b/infrastructure/stacks/postcode_etl/functions/uec-sf-postcode-insert/postcode_insert.py
@@ -28,7 +28,9 @@ def read_csv_files():
         # delete the previously processed files so we have a clean workspace
         bucket.objects.filter(Prefix=PROCESSED_FOLDER).delete()
         # run the process for the first 8 files and this is due to the lambda timeout
-        postcode_location_csv_files = bucket.objects.filter(Prefix=INPUT_FOLDER, Delimiter="/")[:8]
+        postcode_location_csv_files = list(bucket.objects.filter(Prefix=INPUT_FOLDER, Delimiter="/"))[:8]
+        print(postcode_location_csv_files)
+
 
         for postcode_location_csv_file in postcode_location_csv_files:
             name = postcode_location_csv_file.key