diff --git a/.gitignore b/.gitignore
index b9db171..238ed03 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,14 +1,2 @@
-plugins/alerts/
-plugins/clienttools/
-plugins/conditional-metadata/
-plugins/custom-numbering/
-plugins/documentcomparison/
-plugins/i18n/japanese/
-plugins/network/
-plugins/professional-reporting/
-plugins/shortcuts/
-plugins/wintools/
-plugins/updatesandmessages/
-var/cache/configcache
-bin/luceneserver/lucene.pid
-plugins/.gitignore
+var/cache/configcache
+bin/luceneserver/lucene.pid
diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..a84a3fb
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "plugins/commercial"]
+	path = plugins/commercial
+	url = git@github.com:ktgit/commercial-plugins.git
diff --git a/plugins/commercial b/plugins/commercial
new file mode 160000
index 0000000..77b9602
--- /dev/null
+++ b/plugins/commercial
@@ -0,0 +1 @@
+Subproject commit 77b96022d38f178e1daeafa0f820dd5533d9dd8b