diff --git a/storage-s3/README.md b/storage-s3/README.md
index 23d8bd46..c1a802fa 100644
--- a/storage-s3/README.md
+++ b/storage-s3/README.md
@@ -15,4 +15,12 @@
 - `Access Key Id` - AccessKeyId of the S3
 - `Access Key Secret` - AccessKeySecret of the S3
 - `Access Token` - AccessToken of the S3
-- `Visit Url Prefix` - Prefix of access address for the uploaded file, ending with '/' such as https://example.com/xxx/
\ No newline at end of file
+- `Visit Url Prefix` - Prefix of access address for the uploaded file, ending with '/' such as https://example.com/xxx/
+
+### Notes
+
+#### DigitalOcean
+
+If using a DigitalOcean Spaces Object Storage, you must set the following environment
+variable: `ACL_PUBLIC_READ=true`. Without this environment variable set, uploads will
+not be publicly readable. See also [#97](https://github.com/apache/answer-plugins/issues/97).