diff --git a/README.md b/README.md
index fb31d01..519f8ab 100644
--- a/README.md
+++ b/README.md
@@ -10,3 +10,6 @@ The `cdk.json` file tells the [AWS CDK Toolkit](https://github.com/aws/aws-cdk/)
  * `cdk deploy`      deploy this stack to your default AWS account/region
  * `cdk diff`        compare deployed stack with current state
  * `cdk docs`        open CDK documentation
+
+# S3
+- [https://docs.aws.amazon.com/cdk/api/v2/java/software/amazon/awscdk/services/s3/package-summary.html](s3 package)