diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..d0b6407
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "html/metar.js"]
+	path = html/metar.js
+	url = https://github.com/skydivejkl/metar.js
diff --git a/html/metar.js b/html/metar.js
new file mode 160000
index 0000000..089256f
--- /dev/null
+++ b/html/metar.js
@@ -0,0 +1 @@
+Subproject commit 089256fbabb273be9f7e2c36dc12ed00794a6b22