diff --git a/.gitmodules b/.gitmodules
index 1279759..55f8f53 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -79,3 +79,6 @@
 [submodule "bundle/vim-vroom"]
 	path = bundle/vim-vroom
 	url = git://github.com/skalnik/vim-vroom.git
+[submodule "bundle/vimux"]
+	path = bundle/vimux
+	url = git@github.com:benmills/vimux.git
diff --git a/bundle/vimux b/bundle/vimux
new file mode 160000
index 0000000..efa6a9a
--- /dev/null
+++ b/bundle/vimux
@@ -0,0 +1 @@
+Subproject commit efa6a9aa4b830dd8bf393c646ef389bdef666206
diff --git a/vimrc b/vimrc
index 10b6069..e967308 100644
--- a/vimrc
+++ b/vimrc
@@ -144,7 +144,7 @@ nnoremap <c-l> <c-w>l
 " paste mode / paste from system / kill paste mode
 map <leader>p :set paste<CR>o<esc>"*]p:set nopaste<cr>
 
-" format file
+" clean up file formatting
 map <leader>i mmgg=G`m<CR>
 
 " NERDTree mapping
@@ -158,3 +158,9 @@ imap <c-l> <space>=><space>
 
 " Show/hide line numbers
 map <leader>n :set nonumber!<CR>
+
+" Run vroom in vimux
+let g:vroom_use_vimux = 1
+
+" Configure vimux to run a horizontal split
+let g:VimuxOrientation = 'h'