diff --git a/.gitmodules b/.gitmodules
index a0f8faa..72c23b4 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -4,3 +4,6 @@
 [submodule "third_party/nanogui"]
 	path = third_party/nanogui
 	url=git@github.com:rock88/nanogui.git
+[submodule "third_party/json"]
+	path = third_party/json
+	url = https://github.com/nlohmann/json.git
diff --git a/third_party/json b/third_party/json
new file mode 160000
index 0000000..a50a140
--- /dev/null
+++ b/third_party/json
@@ -0,0 +1 @@
+Subproject commit a50a14088c5c131d57f6dd6f91741da49c1ce426