diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000000..6ba26345ba
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "sdk/binaryen"]
+	path = sdk/binaryen
+	url = git@github.com:WebAssembly/binaryen.git
diff --git a/sdk/binaryen b/sdk/binaryen
new file mode 160000
index 0000000000..89b8af006b
--- /dev/null
+++ b/sdk/binaryen
@@ -0,0 +1 @@
+Subproject commit 89b8af006bc56cb4bf68f12a80b1cfe8e7a353d4