diff --git a/init.lua b/init.lua
index 8d1c09ed..d9bfc403 100644
--- a/init.lua
+++ b/init.lua
@@ -212,6 +212,9 @@ vim.keymap.set('n', '<C-k>', '<C-w><C-k>', { desc = 'Move focus to the upper win
 -- Set keymap to toggle nvim-tree
 vim.keymap.set('n', '<leader>e', '<cmd>NvimTreeToggle<CR>', { desc = 'Toggle Nvim Tree' })
 
+-- Set keymap to toggle undo-tree
+vim.keymap.set('n', '<leader>u', ':UndotreeToggle<CR>', { desc = 'Toggle UndoTree' })
+
 -- [[ Basic Autocommands ]]
 --  See `:help lua-guide-autocommands`
 
@@ -268,6 +271,35 @@ vim.opt.rtp:prepend(lazypath)
 require('lazy').setup({
   -- NOTE: Plugins can be added with a link (or for a github repo: 'owner/repo' link).
   'tpope/vim-sleuth', -- Detect tabstop and shiftwidth automatically
+  'mbbill/undotree', -- recommended undo history system
+  {
+    'nvim-tree/nvim-tree.lua',
+    requires = {
+      'nvim-tree/nvim-web-devicons', -- optional, for file icons
+    },
+    config = function()
+      require('nvim-tree').setup {
+        -- Your nvim-tree setup options go here
+        view = {
+          side = 'left',
+          width = 30,
+        },
+        renderer = {
+          icons = {
+            show = {
+              file = true,
+              folder = true,
+              folder_arrow = true,
+              git = true,
+            },
+          },
+        },
+        filters = {
+          dotfiles = false,
+        },
+      }
+    end,
+  },
 
   -- NOTE: Plugins can also be added by using a table,
   -- with the first argument being the link and the following