diff --git a/vim/.vimrc b/vim/.vimrc
index da8215b..13f0d94 100755
--- a/vim/.vimrc
+++ b/vim/.vimrc
@@ -99,3 +99,10 @@ if exists('+termguicolors')
 	set termguicolors
 	colorscheme simplify-dark
 endif
+
+" persistent undo history
+if !isdirectory("/tmp/vim-undo")
+    call mkdir("/tmp/vim-undo", "", 0700)
+endif
+set undodir=/tmp/vim-undo
+set undofile