return {
  -- auto completion
  {
    "hrsh7th/nvim-cmp",
    event = "InsertEnter",
    dependencies = {
      "hrsh7th/cmp-buffer", -- source for text in buffer
      "hrsh7th/cmp-path", -- source for file system paths
      "hrsh7th/cmp-nvim-lsp",
      "L3MON4D3/LuaSnip", -- snippet engine
      "saadparwaiz1/cmp_luasnip", -- for autocompletion
      "rafamadriz/friendly-snippets", -- useful snippets
      "onsails/lspkind.nvim", -- vs-code like pictograms
      "PaterJason/cmp-conjure", -- nvim-cmp source for conjure.
    },
    config = function()
      local cmp = require("cmp")
      local luasnip = require("luasnip")
      local lspkind = require("lspkind")

      -- loads vscode style snippets from installed plugins (e.g. friendly-snippets)
      require("luasnip.loaders.from_vscode").lazy_load()

      cmp.setup({
        completion = {
          completeopt = "menu,menuone,noinsert",
        },
        mapping = cmp.mapping.preset.insert({
          ["<C-u>"] = cmp.mapping.scroll_docs(-4), -- Up
          ["<C-d>"] = cmp.mapping.scroll_docs(4), -- Down
          ["<C-Space>"] = cmp.mapping.complete(), -- show completion suggestions
          ["<C-e>"] = cmp.mapping.abort(), -- close completion window
          ["<CR>"] = cmp.mapping.confirm({ select = false }),
          ["<Tab>"] = cmp.mapping(function(fallback)
            if cmp.visible() then
              cmp.select_next_item()
            elseif luasnip.expand_or_jumpable() then
              luasnip.expand_or_jump()
            else
              fallback()
            end
          end, { "i", "s" }),
          ["<S-Tab>"] = cmp.mapping(function(fallback)
            if cmp.visible() then
              cmp.select_prev_item()
            elseif luasnip.jumpable(-1) then
              luasnip.jump(-1)
            else
              fallback()
            end
          end, { "i", "s" }),
        }),
        -- sources for autocompletion
        sources = cmp.config.sources({
          { name = "nvim_lsp" },
          { name = "luasnip" },
          { name = "path" },
          { name = "buffer" },
          { name = "conjure" },
        }),
        snippet = {
          expand = function(args)
            luasnip.lsp_expand(args.body)
          end,
        },
        -- configure lspkind for vs-code like pictograms in completion menu
        formatting = {
          format = lspkind.cmp_format({
            maxwidth = 50,
            ellipsis_char = "...",
          }),
        },
      })
    end,
  },
}