diff --git a/index.js b/index.js
index b0312e7..3af224e 100644
--- a/index.js
+++ b/index.js
@@ -5,7 +5,7 @@ const defaultOptions = {
     , secretAccessKey: null
     , bucketName: null
     , bucketRegion: null
-    , directory: ''
+    , directory: 'acme-challenge/'
 }
 
 const s3 = new AWS.S3({ apiVersion: '2006-03-01' });
@@ -43,4 +43,4 @@ module.exports.create = (createOptions) => {
     };
 
     return handlers;
-};
\ No newline at end of file
+};