diff --git a/.gitmodules b/.gitmodules
index 5f69fe0..ac2732a 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -10,3 +10,6 @@
 [submodule "bundle/rails"]
 	path = bundle/rails
 	url = git://github.com/tpope/vim-rails.git
+[submodule "bundle/nerdtree"]
+	path = bundle/nerdtree
+	url = git://github.com/scrooloose/nerdtree.git
diff --git a/bundle/nerdtree b/bundle/nerdtree
new file mode 160000
index 0000000..e1abd4d
--- /dev/null
+++ b/bundle/nerdtree
@@ -0,0 +1 @@
+Subproject commit e1abd4d373402f745611305435677a92d7707212
diff --git a/vimrc b/vimrc
index c364a62..4bf523d 100644
--- a/vimrc
+++ b/vimrc
@@ -35,3 +35,6 @@ autocmd FileType php let b:surround_45 = "<?php \r ?>"
 " Settings for rails plugin
 let g:rails_default_file='config/database.yml'
 autocmd User Rails silent! Rlcd
+
+" NERDTree settings
+map <silent> <M-d> :execute 'NERDTreeToggle'<CR>