diff --git a/scalingo.json b/scalingo.json
index 8c899297742..58c943b63c2 100644
--- a/scalingo.json
+++ b/scalingo.json
@@ -31,7 +31,7 @@
       "required": false
     },
     "S3_REGION": {
-      "description": "Amazon S3 region that the bucket is located in",
+      "description": "Amazon S3 region that the bucket is located in; see regions list here: http://docs.aws.amazon.com/general/latest/gr/rande.html",
       "required": false
     },
     "AWS_ACCESS_KEY_ID": {