diff --git a/lib/core.js b/lib/core.js
index ea26d6d..41f256d 100644
--- a/lib/core.js
+++ b/lib/core.js
@@ -11,6 +11,7 @@ function promisifyAll(obj) {
   var aobj = {};
   Object.keys(obj).forEach(function (key) {
     if ('function' === typeof obj[key]) {
+      aobj[key] = obj[key];
       aobj[key + 'Async'] = util.promisify(obj[key]);
     }
   });
diff --git a/package.json b/package.json
index fd7d22a..12c9201 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "greenlock",
-  "version": "2.3.4",
+  "version": "2.3.5",
   "description": "Let's Encrypt for node.js on npm",
   "main": "index.js",
   "files": [