diff --git a/ENVIRONMENT.rst b/ENVIRONMENT.rst
index ea2e3df81..054f3b517 100644
--- a/ENVIRONMENT.rst
+++ b/ENVIRONMENT.rst
@@ -93,6 +93,7 @@ Environment Configuration Settings
 - **LOG_S3_TAGS**: map of key value pairs to be used for tagging files uploaded to S3. Values should be referencing existing environment variables e.g. ``{"ClusterName": "SCOPE", "Namespace": "POD_NAMESPACE"}``
 - **LOG_SHIP_HOURLY**: if true, log rotation in Postgres is set to 1h incl. foreign tables for every hour (schedule `1 */1 * * *`)
 - **LOG_SHIP_SCHEDULE**: cron schedule for shipping compressed logs from ``pg_log`` (``1 0 * * *`` by default)
+- **LOG_FILE_EXTENSION**: (optional) extension of the files in PGDATA/pgroot/pg_log to be shipped to S3 (csv by default)
 - **LOG_ENV_DIR**: directory to store environment variables necessary for log shipping
 - **LOG_TMPDIR**: directory to store temporary compressed daily log files. PGROOT/../tmp by default.
 - **LOG_S3_ENDPOINT**: (optional) S3 Endpoint to use with Boto3
diff --git a/postgres-appliance/scripts/configure_spilo.py b/postgres-appliance/scripts/configure_spilo.py
index 851af037c..a655e97d0 100755
--- a/postgres-appliance/scripts/configure_spilo.py
+++ b/postgres-appliance/scripts/configure_spilo.py
@@ -595,6 +595,7 @@ def get_placeholders(provider):
     placeholders.setdefault('LOG_GROUP_BY_DATE', False)
     placeholders.setdefault('LOG_SHIP_HOURLY', '')
     placeholders.setdefault('LOG_SHIP_SCHEDULE', '1 0 * * *')
+    placeholders.setdefault('LOG_FILE_EXTENSION', 'csv')
     placeholders.setdefault('LOG_S3_BUCKET', '')
     placeholders.setdefault('LOG_S3_ENDPOINT', '')
     placeholders.setdefault('LOG_S3_TAGS', '{}')
@@ -802,7 +803,8 @@ def write_log_environment(placeholders):
                 'LOG_S3_KEY',
                 'LOG_S3_BUCKET',
                 'LOG_S3_TAGS',
-                'PGLOG'):
+                'PGLOG',
+                'LOG_FILE_EXTENSION'):
         write_file(log_env[var], os.path.join(log_env['LOG_ENV_DIR'], var), True)
 
 
diff --git a/postgres-appliance/scripts/upload_pg_log_to_s3.py b/postgres-appliance/scripts/upload_pg_log_to_s3.py
index edc57e706..ced2304b5 100755
--- a/postgres-appliance/scripts/upload_pg_log_to_s3.py
+++ b/postgres-appliance/scripts/upload_pg_log_to_s3.py
@@ -26,8 +26,8 @@ def get_file_names():
         prev_interval_number = prev_interval.strftime('%u-%H')
         upload_filename = prev_interval.strftime('%F-%H')
 
-    log_file = os.path.join(os.getenv('PGLOG'), 'postgresql-' + prev_interval_number + '.csv')
-    archived_log_file = os.path.join(os.getenv('LOG_TMPDIR'), upload_filename + '.csv.gz')
+    log_file = os.path.join(os.getenv('PGLOG'), 'postgresql-' + prev_interval_number + '.' + os.getenv('LOG_FILE_EXTENSION'))
+    archived_log_file = os.path.join(os.getenv('LOG_TMPDIR'), upload_filename + '.' + os.getenv('LOG_FILE_EXTENSION') + '.gz')
 
     return log_file, archived_log_file