diff --git a/index.js b/index.js
index 281d9ba..68ac71f 100644
--- a/index.js
+++ b/index.js
@@ -64,7 +64,8 @@ module.exports.create = function (autoSni) {
         certs: certs
       , tlsContext: 'string' === typeof certs.cert && tls.createSecureContext({
           key: certs.privkey
-        , cert: certs.cert + certs.chain
+          // backwards/forwards compat
+        , cert: (certs.cert||'').replace(/[\r\n]+$/, '') + '\r\n' + certs.chain
         , rejectUnauthorized: autoSni.tlsOptions.rejectUnauthorized
 
         , requestCert: autoSni.tlsOptions.requestCert  // request peer verification
diff --git a/package.json b/package.json
index 4404772..707246d 100644
--- a/package.json
+++ b/package.json
@@ -1,11 +1,11 @@
 {
   "name": "le-sni-auto",
-  "version": "2.1.4",
+  "version": "2.1.5",
   "description": "An auto-sni strategy for registering and renewing letsencrypt certificates using SNICallback",
   "homepage": "https://git.coolaj86.com/coolaj86/le-sni-auto.js",
   "main": "index.js",
   "dependencies": {
-    "bluebird": "^3.4.1"
+    "bluebird": "^3.5.1"
   },
   "devDependencies": {},
   "scripts": {