diff --git a/.gitmodules b/.gitmodules
index 8d2978b71..5baa4e8b8 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,9 @@
 [submodule "MToon"]
 	path = Assets/VRMShaders/MToon
 	url = https://github.com/Santarh/MToon.git
+[submodule "vrm-specification"]
+	path = vrm-specification
+	url = https://github.com/vrm-c/vrm-specification.git
+[submodule "glTF"]
+	path = glTF
+	url = https://github.com/KhronosGroup/glTF.git
diff --git a/glTF b/glTF
new file mode 160000
index 000000000..838b60750
--- /dev/null
+++ b/glTF
@@ -0,0 +1 @@
+Subproject commit 838b6075051739d8c83064d3cd19c8111b576068
diff --git a/vrm-specification b/vrm-specification
new file mode 160000
index 000000000..068254bdf
--- /dev/null
+++ b/vrm-specification
@@ -0,0 +1 @@
+Subproject commit 068254bdf1ca0fb8473487073c82164cb97432d0