diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..be66b92
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "dep/tomlc99"]
+	path = dep/tomlc99
+	url = https://github.com/cktan/tomlc99.git
diff --git a/dep/tomlc99 b/dep/tomlc99
new file mode 160000
index 0000000..5221b3d
--- /dev/null
+++ b/dep/tomlc99
@@ -0,0 +1 @@
+Subproject commit 5221b3d3d66c25a1dc6f0372b4f824f1202fe398