diff --git a/vim/vimrc b/vim/vimrc
index 9de1576..d351b5f 100644
--- a/vim/vimrc
+++ b/vim/vimrc
@@ -28,6 +28,11 @@ if has('nvim')
 	set inccommand=split
 endif
 
+if has("persistent_undo")
+    set undodir=$HOME."/.undodir"
+    set undofile
+endif
+
 let g:ale_set_baloons = 1
 let g:ale_completion_enabled = 1
 
@@ -67,7 +72,11 @@ let g:airline#extensions#tabline#enabled = 1
 let g:airline_powerline_fonts = 1
 let g:airline#extensions#tabline#formatter = 'unique_tail_improved'
 
-nnoremap <C-U> :UndotreeToggle<cr>
+nnoremap <leader>u :UndotreeToggle<cr>
+nnoremap <leader>h <C-W><C-H> 
+nnoremap <leader>j <C-W><C-J>
+nnoremap <leader>k <C-W><C-K>
+nnoremap <leader>l <C-W><C-L>
 
 "which-key
 let g:which_key_map =  {}