diff --git a/packages/providers/upload-aws-s3/README.md b/packages/providers/upload-aws-s3/README.md
index 47d1642cfe..d35adc75a8 100644
--- a/packages/providers/upload-aws-s3/README.md
+++ b/packages/providers/upload-aws-s3/README.md
@@ -124,6 +124,22 @@ module.exports = [
 
 If you use dots in your bucket name, the url of the ressource is in directory style (`s3.yourRegion.amazonaws.com/your.bucket.name/image.jpg`) instead of `yourBucketName.s3.yourRegion.amazonaws.com/image.jpg`. Then only add `s3.yourRegion.amazonaws.com` to img-src and media-src directives.
 
+## Bucket CORS Configuration
+
+If you are planning on uploading content like GIFs and videos to your S3 bucket, you will want to edit its CORS configuration so that thumbnails are properly shown in Strapi. To do so, open your Bucket on the AWS console and locate the _Cross-origin resource sharing (CORS)_ field under the _Permissions_ tab, then amend the policies by writing your own JSON configuration, or copying and pasting the following one:
+
+```json
+[
+  {
+    "AllowedHeaders": ["*"],
+    "AllowedMethods": ["GET"],
+    "AllowedOrigins": ["YOUR STRAPI URL"],
+    "ExposeHeaders": [],
+    "MaxAgeSeconds": 3000
+  }
+]
+```
+
 ## Required AWS Policy Actions
 
 These are the minimum amount of permissions needed for this provider to work.