return {
    "hrsh7th/nvim-cmp",
    dependencies = {
        "neovim/nvim-lspconfig",
        "hrsh7th/cmp-nvim-lsp",
        "petertriho/cmp-git",
        "hrsh7th/cmp-buffer",
        "hrsh7th/cmp-path",
        "hrsh7th/cmp-cmdline",
        "hrsh7th/cmp-vsnip",
        "hrsh7th/vim-vsnip",
        "hrsh7th/cmp-nvim-lsp-signature-help",
    },
    config = function()
        local cmp = require"cmp"
        cmp.setup({
            snippet = {
                -- REQUIRED - you must specify a snippet engine
                expand = function(args)
                    vim.fn["vsnip#anonymous"](args.body) -- For `vsnip` users.
                    -- require("luasnip").lsp_expand(args.body) -- For `luasnip` users.
                    -- require("snippy").expand_snippet(args.body) -- For `snippy` users.
                    -- vim.fn["UltiSnips#Anon"](args.body) -- For `ultisnips` users.
                end,
            },
            window = {
                -- completion = cmp.config.window.bordered(),
                -- documentation = cmp.config.window.bordered(),
            },
            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.confirm({ select = true }), -- Accept currently selected item. Set `select` to `false` to only confirm explicitly selected items.
            }),
            sources = cmp.config.sources({
                { name = "nvim_lsp" },
                { name = "vsnip" }, -- For vsnip users.
                -- { name = "luasnip" }, -- For luasnip users.
                -- { name = "ultisnips" }, -- For ultisnips users.
                -- { name = "snippy" }, -- For snippy users.
            }, {
                { name = "buffer" },
                { name = "nvim_lsp_signature_help" },
            })
        })

        -- Set configuration for specific filetype.
        cmp.setup.filetype("gitcommit", {
            sources = cmp.config.sources({
                { name = "git" },
            }, {
                { name = "buffer" },
            })
        })

        cmp.setup.filetype("cmake", {
            sources = cmp.config.sources({
                { name = "cmake", "CMakeLists.txt" },
            }, {
                { name = "buffer" },
            })
        })

        -- Use buffer source for `/` and `?` (if you enabled `native_menu`, this won"t work anymore).
        cmp.setup.cmdline({ "/", "?" }, {
            mapping = cmp.mapping.preset.cmdline(),
            sources = {
                { name = "buffer" }
            }
        })

        -- Use cmdline & path source for ":" (if you enabled `native_menu`, this won"t work anymore).
        cmp.setup.cmdline(":", {
            mapping = cmp.mapping.preset.cmdline(),
            sources = cmp.config.sources({
                { name = "path" }
            }, {
                { name = "cmdline" }
            })
        })
    end,
}