diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..4729540
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "spec"]
+	path = spec
+	url = https://github.com/mustache/spec
diff --git a/spec b/spec
new file mode 160000
index 0000000..97c05b0
--- /dev/null
+++ b/spec
@@ -0,0 +1 @@
+Subproject commit 97c05b0652f06ef4cbe12016b8d0e41df31c4b05