diff --git a/README.rst b/README.rst
index 300c3e5..6321347 100644
--- a/README.rst
+++ b/README.rst
@@ -66,6 +66,20 @@
               Version: GnuPG v1
               ...
 
+Define s3 endpoint:
+
+.. code-block:: yaml
+
+    parameters:
+      aptly:
+        server:
+          endpoint:
+            mys3endpoint:
+              engine: s3
+              awsAccessKeyID: xxxx
+              awsSecretAccessKey: xxxx
+              bucket: test
+
 Example pillar
 ==============