diff --git a/lua/plugins/common.lua b/lua/plugins/common.lua
index b8863e1..793767b 100644
--- a/lua/plugins/common.lua
+++ b/lua/plugins/common.lua
@@ -1,8 +1,9 @@
 return {
   { 'numToStr/Comment.nvim', opts = {} },
-  { 'tpope/vim-sleuth' },
-  { 'tpope/vim-abolish', lazy = false },
+  { 'tpope/vim-sleuth' }, -- detect shiftwidth, expandtab heristically
   { 'tpope/vim-unimpaired', lazy = false },
+  -- { 'tpope/vim-abolish', lazy = false },
+  -- { 'gbprod/substitute.nvim', opts = {} }, not sure if usefull
   { 'lukas-reineke/indent-blankline.nvim', main = 'ibl', opts = {} },
   {
     'folke/todo-comments.nvim',
@@ -31,6 +32,14 @@ return {
       -- require('mini.colors').setup()
     end,
   },
+  {
+    'jiaoshijie/undotree',
+    dependencies = 'nvim-lua/plenary.nvim',
+    config = true,
+    keys = {
+      { '<leader>u', "<cmd>lua require('undotree').toggle()<cr>", desc = 'Undotree' },
+    },
+  },
   {
     'folke/which-key.nvim',
     event = 'VeryLazy',