diff --git a/.gitmodules b/.gitmodules
index 338f571..f3d929a 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -73,3 +73,6 @@
 [submodule "plugins/gratitude"]
 	path = plugins/gratitude
 	url = https://github.com/BlythT/Gratitude-Millennium-Plugin
+[submodule "plugins/hizsearch"]
+	path = plugins/hizsearch
+	url = https://github.com/hiz0147/HizSearch-Millennium
diff --git a/plugins/hizsearch b/plugins/hizsearch
new file mode 160000
index 0000000..cbc666f
--- /dev/null
+++ b/plugins/hizsearch
@@ -0,0 +1 @@
+Subproject commit cbc666f64a5739577ba24188849b89a642de4c5a