return {
  'nvim-treesitter/nvim-treesitter',
  lazy = false,
  build = ':TSUpdate',
  config = function()
    -- Auto launch tree-sitter
    local ts = require('nvim-treesitter')
    vim.api.nvim_create_autocmd('FileType', {
      pattern = ts.get_available(),
      callback = function(event)
        -- Auto install languages
        if event.match ~= ts.get_installed() then
          ts.install({ event.match }):wait(30000) -- 30 sec timeout
        end
        -- syntax highlighting, provided by Neovim
        vim.treesitter.start()
        -- Use regex highlighting as well as tree-sitter
        vim.bo.syntax = event.match
        -- folds, provided by Neovim
        vim.wo.foldexpr = 'v:lua.vim.treesitter.foldexpr()'
        vim.wo.foldmethod = 'expr'
        -- indentation, provided by nvim-treesitter
        vim.bo.indentexpr = "v:lua.require'nvim-treesitter'.indentexpr()"
      end,
    })
  end
}