diff --git a/lib/get-acme-urls.js b/lib/get-acme-urls.js
index 25ecdb0..3075879 100644
--- a/lib/get-acme-urls.js
+++ b/lib/get-acme-urls.js
@@ -30,6 +30,8 @@ module.exports.create = function (deps) {
         try {
           data = JSON.parse(data);
         } catch(e) {
+          err.raw = data;
+          err.stack += '\n' + data;
           cb(e);
           return;
         }