diff --git a/.gitmodules b/.gitmodules
index d7c101d..82fbcf2 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -10,3 +10,6 @@
 [submodule "vim/bundle/ctrlp"]
 	path = vim/bundle/ctrlp
 	url = https://github.com/kien/ctrlp.vim.git
+[submodule "vim/bundle/ferm"]
+	path = vim/bundle/ferm
+	url = https://github.com/cometsong/ferm.vim
diff --git a/vim/bundle/ferm b/vim/bundle/ferm
new file mode 160000
index 0000000..e05eb6f
--- /dev/null
+++ b/vim/bundle/ferm
@@ -0,0 +1 @@
+Subproject commit e05eb6f10a2adfd657c17119a0cd1ba9a3f773a4