diff --git a/agent/site.py b/agent/site.py
index 06d07824..97963cba 100644
--- a/agent/site.py
+++ b/agent/site.py
@@ -380,12 +380,14 @@ def upload_offsite_backup(self, backup_files, offsite):
                 aws_access_key_id=auth["ACCESS_KEY"],
                 aws_secret_access_key=auth["SECRET_KEY"],
                 region_name=region,
+                endpoint_url=auth.get("ENDPOINT_URL"),
             )
         else:
             s3 = boto3.client(
                 "s3",
                 aws_access_key_id=auth["ACCESS_KEY"],
                 aws_secret_access_key=auth["SECRET_KEY"],
+                endpoint_url=auth.get("ENDPOINT_URL"),
             )
 
         for backup_file in backup_files.values():