return {
    {
        "hrsh7th/nvim-cmp",
        dependencies = {
            -- extra completion plugins
            "hrsh7th/cmp-cmdline",
            "hrsh7th/cmp-path",
            "hrsh7th/cmp-buffer",
            "hrsh7th/cmp-nvim-lsp",
            "hrsh7th/cmp-calc",
            "hrsh7th/cmp-emoji",
            "kdheepak/cmp-latex-symbols",
            -- snippets
            "saadparwaiz1/cmp_luasnip",
            "L3MON4D3/LuaSnip",
            "onsails/lspkind.nvim",
        },
        config = function(_, _)
            local cmp = require("cmp")
            cmp.setup({
                window = {
                    completion = {
                        border = "none",
                        scrollbar = false,
                        winhighlight = "Normal:Pmenu,FloatBorder:FloatBorder,Search:None",
                    },
                    documentation = {
                        border = "none",
                        scrollbar = false,
                        winhighlight = "Normal:Pmenu,FloatBorder:FloatBorder,Search:None",
                    },
                },
                snippet = {
                    expand = function(args)
                        require("luasnip").lsp_expand(args.body)
                    end,
                },
                completion = {
                    completeopt = "longest,menuone,noinsert,noselect",
                },
                sources = cmp.config.sources({
                    { name = "nvim_lsp" },
                    { name = "nvim_lsp_signature_help" },
                    { name = "luasnip" },
                    { name = "buffer" },
                    { name = "path" },
                }, {
                    { name = "calc" },
                    { name = "emoji" },
                    { name = "cmdline" },
                    { name = "latex_symbols" },
                }),
                mapping = cmp.mapping.preset.insert({
                    ["<C-b>"] = cmp.mapping.scroll_docs(-4),
                    ["<C-f>"] = cmp.mapping.scroll_docs(4),
                    ["<C-Space>"] = cmp.mapping.complete(),
                    ["<C-e>"] = cmp.mapping.abort(),
                    ["<CR>"] = cmp.mapping({
                        i = function(fallback)
                            if cmp.visible() and cmp.get_active_entry() then
                                cmp.confirm({ behavior = cmp.ConfirmBehavior.Replace, select = false })
                            else
                                fallback()
                            end
                        end,
                        s = cmp.mapping.confirm({ select = true }),
                        c = cmp.mapping.confirm({ behavior = cmp.ConfirmBehavior.Replace, select = true }),
                    }),
                }),
                formatting = {
                    fields = { "kind", "abbr", "menu" },
                    format = function(entry, item)
                        local kind = require("lspkind").cmp_format({ mode = "symbol_text", maxwidth = 50 })(entry, item)
                        local strings = vim.split(kind.kind, "%s", { trimempty = true })
                        kind.kind = (strings[1] or "") .. " "
                        kind.menu = "    (" .. (strings[2] or "") .. ")"

                        return kind
                    end,
                },
                experimental = {
                    ghost_text = {
                        hl_group = "NonText",
                    },
                },
            })
        end,
    },
}