diff --git a/src/utils/common.py b/src/utils/common.py
index 2c15b20..e0f493b 100644
--- a/src/utils/common.py
+++ b/src/utils/common.py
@@ -54,7 +54,7 @@ def read_and_normalize_csv_or_xlsx(input_file: Union[List[TextIO], List[Path], T
         if isinstance(f, Path):
             if f.suffix.lower() == ".csv":
                 with f.open("r", encoding="utf-8") as f:
-                    reader = csv.DictReader(f)
+                    reader = list(csv.DictReader(f))
 
             elif f.suffix.lower() == ".xlsx":
                 output = StringIO()