diff --git a/.gitmodules b/.gitmodules
index e69de29..056ba89 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "tg"]
+	path = tg
+	url = https://github.com/vysheng/tg
diff --git a/tg b/tg
new file mode 160000
index 0000000..f38ab35
--- /dev/null
+++ b/tg
@@ -0,0 +1 @@
+Subproject commit f38ab35b5a89d233eb80e668a1bc3c470262a69a