diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..9bb357f
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "third_party/pybind11"]
+	path = third_party/pybind11
+	url = https://github.com/pybind/pybind11.git
diff --git a/third_party/pybind11 b/third_party/pybind11
new file mode 160000
index 0000000..3b1dbeb
--- /dev/null
+++ b/third_party/pybind11
@@ -0,0 +1 @@
+Subproject commit 3b1dbebabc801c9cf6f0953a4c20b904d444f879