diff --git a/etc/emq.conf b/etc/emq.conf
index c6f11331b..7d248d9f5 100644
--- a/etc/emq.conf
+++ b/etc/emq.conf
@@ -231,8 +231,8 @@ mqtt.listener.https = 8084
 mqtt.listener.https.acceptors = 4
 mqtt.listener.https.max_clients = 64
 mqtt.listener.https.handshake_timeout = 15
-mqtt.listener.https.certfile = etc/certs/cert.pem
 mqtt.listener.https.keyfile = etc/certs/key.pem
+mqtt.listener.https.certfile = etc/certs/cert.pem
 ## mqtt.listener.https.cacertfile = etc/certs/cacert.pem
 ## mqtt.listener.https.verify = verify_peer
 ## mqtt.listener.https.fail_if_no_peer_cert = true