diff --git a/crm/views/seller_views.py b/crm/views/seller_views.py
index 5122422..8f5ff0a 100644
--- a/crm/views/seller_views.py
+++ b/crm/views/seller_views.py
@@ -235,12 +235,15 @@ def preview_document(request):
     if aws_access and aws_secret:
         try:
             import boto3
+            from botocore.client import Config
             from django.shortcuts import redirect
             s3_client = boto3.client(
                 's3',
                 aws_access_key_id=aws_access,
                 aws_secret_access_key=aws_secret,
-                region_name=os.environ.get('AWS_REGION', 'ap-south-2')
+                region_name=os.environ.get('AWS_REGION', 'ap-south-2'),
+                endpoint_url=f"https://s3.{os.environ.get('AWS_REGION', 'ap-south-2')}.amazonaws.com",
+                config=Config(signature_version='s3v4')
             )
             presigned_url = s3_client.generate_presigned_url(
                 'get_object',