diff --git a/PLUGIN.md b/PLUGIN.md
index 7991de2cd..26993390a 100644
--- a/PLUGIN.md
+++ b/PLUGIN.md
@@ -1,4 +1,8 @@
 
+git submodule init 
+
+or
+
+git submodule update --remote
+
 Please see [Plugin Design](https://github.com/emqtt/emqttd/wiki/Plugin%20Design).
-
-