diff --git a/.gitmodules b/.gitmodules
index deb2f03..100cbb2 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -56,3 +56,6 @@
 [submodule "with-editor"]
 	path = lib/with-editor
 	url = git@github.com:magit/with-editor.git
+[submodule "yaml-mode"]
+	path = lib/yaml-mode
+	url = git@github.com:yoshiki/yaml-mode.git
diff --git a/lib/yaml-mode b/lib/yaml-mode
new file mode 160000
index 0000000..28c3403
--- /dev/null
+++ b/lib/yaml-mode
@@ -0,0 +1 @@
+Subproject commit 28c34033194130d452d5c958b5241c88d42ca02b