diff --git a/common/.vimrc b/common/.vimrc
index be54201..76ba424 100644
--- a/common/.vimrc
+++ b/common/.vimrc
@@ -114,7 +114,8 @@ imap <silent> <F5> <Esc>:let @/=''<CR>a
 nmap <silent> <F8> :TagbarToggle<CR>
 imap <silent> <F8> <Esc>:TagbarToggle<CR>a
 
-nmap <silent> <F9> zR
+nmap <silent> <F9> :NERDTreeToggle<CR>
+imap <silent> <F9> <Esc>:NERDTreeToggle<CR>a
 
 nmap <silent> <M-1> :set shiftwidth=1 softtabstop=1 tabstop=1 expandtab<CR>
 imap <silent> <M-1> <Esc> :set shiftwidth=1 softtabstop=1 tabstop=1 expandtab<CR>a