diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..2632a03
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "cxx/quickjs"]
+  path = cxx/quickjs
+  url = https://github.com/ekibun/quickjs.git
\ No newline at end of file
diff --git a/cxx/quickjs b/cxx/quickjs
new file mode 160000
index 0000000..b994795
--- /dev/null
+++ b/cxx/quickjs
@@ -0,0 +1 @@
+Subproject commit b9947950913b9dd3edb79f72f8fcc4b61a02a0d4