diff --git a/README.md b/README.md
index 45d7d00..fe6f16d 100644
--- a/README.md
+++ b/README.md
@@ -69,13 +69,24 @@ If you want to quickly test the certificates you installed,
 you can do so like this:
 
 ```bash
-serve-https -p 8443 \
+sudo serve-https -p 8443 \
+  --letsencrypt-certs test.mooo.com \
+  --serve-chain true
+```
+
+which is equilavent to
+
+```bash
+sudo serve-https -p 8443 \
+  --servername test.mooo.com
   --key /etc/letsencrypt/live/test.mooo.com/privkey.pem \
   --cert /etc/letsencrypt/live/test.mooo.com/cert.pem \
   --chain /etc/letsencrypt/live/test.mooo.com/chain.pem \
-  -c "$(cat '/etc/letsencrypt/live/test.mooo.com/chain.pem')"
+  -c "$(cat 'sudo /etc/letsencrypt/live/test.mooo.com/chain.pem')"
 ```
 
+and can be tested like so
+
 ```bash
 curl --insecure https://test.mooo.com:8443 > ./chain.pem
 curl https://test.mooo.com:8843 --cacert ./chain.pem
diff --git a/serve.js b/serve.js
index 2f48470..a1f2d42 100755
--- a/serve.js
+++ b/serve.js
@@ -70,6 +70,7 @@ function run() {
   var port = argv.p || argv.port || argv._[0] || 8443;
   var pubdir = path.resolve(argv.d || argv._[1] || process.cwd());
   var content = argv.c;
+  var letsencryptHost = argv['letsencrypt-certs'];
 
   var cert = require('localhost.daplie.com-certificates');
   var opts = {
@@ -82,7 +83,14 @@ function run() {
     }
   };
 
-  if (argv.key || argv.cert || argv.chain) {
+  if (letsencryptHost) {
+    argv.key = argv.key || '/etc/letsencrypt/live/' + letsencryptHost + '/privkey.pem';
+    argv.cert = argv.cert || '/etc/letsencrypt/live/' + letsencryptHost + '/cert.pem';
+    argv.chain = argv.chain || '/etc/letsencrypt/live/' + letsencryptHost + '/chain.pem';
+    argv.servername = argv.servername || letsencryptHost;
+  }
+
+  if (argv.key || argv.cert || argv.chain || argv['serve-chain']) {
     if (!argv.key || !argv.cert || !argv.chain) {
       console.error("You must specify each of --key --cert and --chain (chain may be empty)");
       return;
@@ -104,6 +112,10 @@ function run() {
         return (ca + '-----END CERTIFICATE-----').trim();
       }));
     }, []);
+
+    if (argv['serve-chain']) {
+      content = opts.ca.join('\r\n');
+    }
   }
 
   opts.servername = 'localhost.daplie.com';