diff --git a/README.rst b/README.rst
index 1ab5f4c..e574089 100644
--- a/README.rst
+++ b/README.rst
@@ -23,3 +23,8 @@ Usage
      photo = models.FileField(
          storage=BYOStorage(),
          upload_to=generate_filename)
+
+Notes
+=====
+
+Boto3 client sometimes doesn't respect the `region_name` so it may be neccesary to set `endpoint_url: https://https://s3-<region>.amazonaws.com`
\ No newline at end of file