diff --git a/flows/backup.py b/flows/backup.py
index 950eb4a..22f0e79 100644
--- a/flows/backup.py
+++ b/flows/backup.py
@@ -10,6 +10,7 @@ from pathlib import Path
 from tempfile import TemporaryDirectory
 
 from prefect import flow, task, get_run_logger
+from prefect.blocks.system import Secret
 from prefect_aws import AwsCredentials
 import boto3
 
@@ -113,12 +114,12 @@ def pg_backup(
     pg_port: int = 5432,
     pg_database: str = "postgres",
     pg_user: str = "postgres",
-    pg_password: str = "",
     # S3 destination
-    s3_bucket: str = "backups",
-    s3_prefix: str = "postgresql",
-    # Prefect Block name for AWS credentials
+    s3_bucket: str = "postgres-backup",
+    s3_prefix: str = "default",
+    # Prefect Block names
     aws_credentials_block: str = "garage-credentials",
+    pg_password_block: str = "netbox-db-password",
 ) -> str:
     """
     Flow principal de backup PostgreSQL vers S3.
@@ -128,10 +129,10 @@ def pg_backup(
         pg_port: Port PostgreSQL
         pg_database: Nom de la base à sauvegarder
         pg_user: Utilisateur PostgreSQL
-        pg_password: Mot de passe PostgreSQL
         s3_bucket: Bucket S3 de destination
         s3_prefix: Préfixe (dossier) dans le bucket
         aws_credentials_block: Nom du block Prefect contenant les credentials AWS/S3
+        pg_password_block: Nom du block Secret contenant le mot de passe PostgreSQL
     
     Returns:
         URI S3 du backup
@@ -139,8 +140,9 @@ def pg_backup(
     logger = get_run_logger()
     logger.info(f"Starting backup of {pg_database}")
     
-    # Charger les credentials S3 depuis le block Prefect
+    # Charger les credentials depuis les blocks Prefect
     credentials = AwsCredentials.load(aws_credentials_block)
+    pg_password = Secret.load(pg_password_block).get()
     
     with TemporaryDirectory() as tmpdir:
         # Dump de la base
@@ -171,5 +173,4 @@ if __name__ == "__main__":
         pg_host="postgresql.taila5ad8.ts.net",
         pg_database="netbox",
         pg_user="netbox",
-        pg_password="test",
     )