diff --git a/airflow/dags/common.py b/airflow/dags/common.py
index cd12b0a..a4af8a4 100644
--- a/airflow/dags/common.py
+++ b/airflow/dags/common.py
@@ -1,21 +1,8 @@
-
-import gzip
-import io
-import json
 import os
 import zipfile
-from datetime import timedelta
 
-from airflow.decorators import dag
-from airflow.decorators import task
-from airflow.operators.python import PythonOperator
 from airflow.providers.amazon.aws.hooks.s3 import S3Hook
 from airflow.utils.file import TemporaryDirectory
-from airflow.utils.helpers import chain
-from airflow.models import Variable
-
-from opensearchpy import OpenSearch, helpers
-from EOSC_indexes import mappings
 
 
 def strip_prefix(s, p):
@@ -34,13 +21,8 @@ def s3_dowload_unzip_upload(s3conn: str, src_key: str, src_bucket: str, dest_buc
             hook.download_file(key=src_key, bucket_name=src_bucket, local_path=dwl_dir, preserve_file_name=True,
                                use_autogenerated_subdir=False)
             with zipfile.ZipFile(archive, 'r') as zip_ref:
-                zip_ref.extractall(tmp_dir)
-
-            for root, _, files in os.walk(tmp_dir):
-                for file in files:
-                    local_file_path = os.path.join(root, file)
-                    hook.load_file(local_file_path, strip_prefix(local_file_path, tmp_dir + "/"), dest_bucket,
-                                   replace=True)
-
+                for info in zip_ref.infolist():
+                    with zip_ref.open(info.filename) as file:
+                        hook.load_file_obj(file, info.filename, dest_bucket, replace=True)