diff --git a/src/emqttd.app.src b/src/emqttd.app.src
index ca2a561c2..2751c9784 100644
--- a/src/emqttd.app.src
+++ b/src/emqttd.app.src
@@ -1,6 +1,6 @@
 {application, emqttd, [
     {description, "Erlang MQTT Broker"},
-    {vsn, "2.1.0"},
+    {vsn, "2.1.1"},
     {modules, []},
     {registered, [emqttd_sup]},
     {applications, [kernel,stdlib,gproc,lager,esockd,mochiweb,lager_syslog,pbkdf2]},