diff --git a/semag/125/.gitmodules b/semag/125/.gitmodules
new file mode 100644
index 00000000..1c10a473
--- /dev/null
+++ b/semag/125/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "cheerpj-natives"]
+	path = cheerpj-natives
+	url = https://github.com/leaningtech/cheerpj-natives.git
diff --git a/semag/125/_headers b/semag/125/_headers
new file mode 100644
index 00000000..24b4c0cf
--- /dev/null
+++ b/semag/125/_headers
@@ -0,0 +1,2 @@
+/cheerpj-natives/natives/lwjgl.js
+  Content-Type: application/octet-stream