diff --git a/CHANGES.md b/CHANGES.md
index 20875d05..19f79cc4 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,4 +1,6 @@
+## Unreleased
 
+* add support for setting the S3 endpoint url via the `AWS_S3_ENDPOINT` environment variables in `aws_get_object` function using boto3 (https://github.com/cogeotiff/rio-tiler/pull/394)
 ## 2.1.0 (2021-05-17)
 
 * add auto-rescaling in `ImageData.render` method to avoid error when datatype is not supported by the output driver (https://github.com/cogeotiff/rio-tiler/pull/391)
diff --git a/rio_tiler/utils.py b/rio_tiler/utils.py
index 7379dab9..c305b3f4 100644
--- a/rio_tiler/utils.py
+++ b/rio_tiler/utils.py
@@ -1,5 +1,6 @@
 """rio_tiler.utils: utility functions."""
 
+import os
 from io import BytesIO
 from typing import Any, Dict, Generator, Optional, Sequence, Tuple, Union
 
@@ -36,7 +37,8 @@ def aws_get_object(
     """AWS s3 get object content."""
     if not client:
         session = boto3_session()
-        client = session.client("s3")
+        endpoint_url = os.environ.get("AWS_S3_ENDPOINT", None)
+        client = session.client("s3", endpoint_url=endpoint_url)
 
     params = {"Bucket": bucket, "Key": key}
     if request_pays: