diff --git a/plugins/emqttd_plugin_demo/src/emqttd_plugin_demo_app.erl b/plugins/emqttd_plugin_demo/src/emqttd_plugin_demo_app.erl
index 4976b2fc4..b3898f7f6 100644
--- a/plugins/emqttd_plugin_demo/src/emqttd_plugin_demo_app.erl
+++ b/plugins/emqttd_plugin_demo/src/emqttd_plugin_demo_app.erl
@@ -16,4 +16,6 @@ start(_StartType, _StartArgs) ->
     {ok, Sup}.
 
 stop(_State) ->
+    emqttd_access_control:unregister_mod(auth, emqttd_plugin_demo_auth),
+    emqttd_access_control:unregister_mod(acl, emqttd_plugin_demo_acl),
     ok.