diff --git a/index.js b/index.js
index abab3fd..24026c2 100644
--- a/index.js
+++ b/index.js
@@ -51,7 +51,7 @@ module.exports.create = function (opts) {
     );
     httpType = 'http';
 
-    return { server: server, listen: function () { return new Promise(function (resolve, reject) {
+    return { server: server, listen: function () { return new PromiseA(function (resolve, reject) {
       args[0] = p;
       args.push(function () {
         if (!greenlock.servername) {
@@ -135,11 +135,16 @@ module.exports.create = function (opts) {
           // ignore the case that check doesn't have all the right args here
           // to get the same certs that it just got (eventually the right ones will come in)
           if (!certs) { return; }
-          console.info("Using '%s' as default certificate", domain);
-          server.setSecureContext({
-            key: Buffer.from(certs.privkey, 'ascii')
-          , cert: Buffer.from(certs.cert + '\r\n' + certs.chain, 'ascii')
-          });
+          try {
+            server.setSecureContext({
+              key: Buffer.from(certs.privkey, 'ascii')
+            , cert: Buffer.from(certs.cert + '\r\n' + certs.chain, 'ascii')
+            });
+            console.info("Using '%s' as default certificate", domain);
+          } catch(e) {
+            console.warn("node " + process.version + " is out of date and some (nice, but non-critical) features are unavaliable.");
+            console.warn("Please update to node v10.13+ if possible.");
+          }
           server._hasDefaultSecureContext = true;
         }).catch(function (/*e*/) {
           // this may be that the test.example.com was requested, but it's listed
@@ -210,7 +215,12 @@ module.exports.create = function (opts) {
 
     server.then = obj1.listen().then(function (tlsOptions) {
       if (tlsOptions) {
-        server.setSecureContext(tlsOptions);
+        try {
+          server.setSecureContext(tlsOptions);
+        } catch(e) {
+          console.warn("node " + process.version + " is out of date and some (nice, but non-critical) features are unavaliable.");
+          console.warn("Please update to node v10.13+ if possible.");
+        }
         server._hasDefaultSecureContext = true;
       }
       return obj2.listen().then(function () {
diff --git a/package.json b/package.json
index c198e52..2e378fb 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "greenlock-express",
-  "version": "2.6.4",
+  "version": "2.6.5",
   "description": "Free SSL and managed or automatic HTTPS for node.js with Express, Koa, Connect, Hapi, and all other middleware systems.",
   "main": "index.js",
   "homepage": "https://git.coolaj86.com/coolaj86/greenlock-express.js",