diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..7c918de
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "rapidjson"]
+	path = rapidjson
+	url = https://github.com/Tencent/rapidjson.git
diff --git a/rapidjson b/rapidjson
new file mode 160000
index 0000000..012be85
--- /dev/null
+++ b/rapidjson
@@ -0,0 +1 @@
+Subproject commit 012be8528783cdbf4b7a9e64f78bd8f056b97e24