diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..921eb39
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "assets/oauth3.org"]
+	path = assets/oauth3.org
+	url = https://git.oauth3.org/OAuth3/oauth3.js.git