diff --git a/pipelines/serpro/flows.py b/pipelines/serpro/flows.py
index ca7c261a..d809120c 100644
--- a/pipelines/serpro/flows.py
+++ b/pipelines/serpro/flows.py
@@ -19,7 +19,7 @@
     parse_timestamp_to_string,
     rename_current_flow_run_now_time,
     run_dbt_model,
-    transform_raw_to_nested_structure,
+    transform_raw_to_nested_structure_chunked,
     upload_raw_data_to_gcs,
     upload_staging_data_to_gcs,
 )
@@ -58,13 +58,14 @@
         jdbc=jdbc, start_date=start_date, end_date=end_date, local_filepath=local_filepaths
     )
 
-    errors, treated_filepaths = transform_raw_to_nested_structure(
+    errors, treated_filepaths = transform_raw_to_nested_structure_chunked(
         raw_filepath=raw_filepaths,
         filepath=local_filepaths,
         primary_key=constants.SERPRO_CAPTURE_PARAMS.value["primary_key"],
         timestamp=timestamp,
         reader_args=constants.SERPRO_CAPTURE_PARAMS.value["pre_treatment_reader_args"],
         error=None,
+        chunksize=50000,
     )
 
     errors = upload_raw_data_to_gcs(