diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..208f16b
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,4 @@
+[submodule "vendor/github.com/3d0c/gmf"]
+	path = vendor/github.com/3d0c/gmf
+	url = https://github.com/icedream/gmf.git
+	branch = master
diff --git a/vendor/github.com/3d0c/gmf b/vendor/github.com/3d0c/gmf
new file mode 160000
index 0000000..f158770
--- /dev/null
+++ b/vendor/github.com/3d0c/gmf
@@ -0,0 +1 @@
+Subproject commit f158770a793e28c093dc22c2a9ef0af20bdd804f