return {
    { 'https://github.com/hrsh7th/nvim-cmp',
        dependencies = {
            'https://github.com/hrsh7th/cmp-nvim-lsp',
            'https://github.com/hrsh7th/cmp-buffer',
            'https://github.com/hrsh7th/cmp-path',
            'https://github.com/hrsh7th/cmp-cmdline',
            { 'https://github.com/saadparwaiz1/cmp_luasnip',
                dependencies = 'https://github.com/L3MON4D3/LuaSnip',
            },
            'https://github.com/hrsh7th/cmp-nvim-lua',
            { 'https://github.com/uga-rosa/cmp-dictionary',
                opts = {
                    dic = {
                        ['gitcommit'] =
                            vim.fn.stdpath('config') .. '/resources/git.dict',
                        -- doesn't work, filetype is probably set too late
                        ['NeogitCommitMessage'] =
                            vim.fn.stdpath('config') .. '/resources/git.dict',
                    },
                },
            },
            'https://github.com/f3fora/cmp-spell',
            { 'https://github.com/tamago324/cmp-zsh',
                opts = {
                    filetypes = { 'zsh', 'bash', 'sh' },
                }
            },
            { 'https://github.com/paopaol/cmp-doxygen',
                dependencies = {
                    'nvim-treesitter',
                    'https://github.com/nvim-treesitter/nvim-treesitter-textobjects',
                },
            },
            'https://github.com/onsails/lspkind.nvim',
        },
        config = function()
            local cmp = require('cmp')
            local luasnip = require('luasnip')
            local lspkind = require('lspkind')
            cmp.setup({
                snippet = {
                    expand = function(args)
                        luasnip.lsp_expand(args.body)
                    end,
                },
                window = {
                    completion = cmp.config.window.bordered(),
                    documentation = cmp.config.window.bordered(),
                },
                formatting = {
                    format = lspkind.cmp_format({
                        mode = "symbol_text",
                        maxwidth = math.floor(vim.o.columns / 2),
                        ellipsis_char = '…',
                        menu = ({
                            buffer = "[Buffer]",
                            nvim_lsp = "[LSP]",
                            luasnip = "[LuaSnip]",
                            nvim_lua = "[Lua]",
                            latex_symbols = "[Latex]",
                        })
                    }),
                },
                mapping = cmp.mapping.preset.insert({
                    ['<S-PageUp>'] = cmp.mapping.scroll_docs(-4),
                    ['<S-PageDown>'] = cmp.mapping.scroll_docs(4),
                    ['<C-Space>'] = cmp.mapping.complete(),
                    ['<C-e>'] = cmp.mapping.abort(),
                    ['<Left>'] = cmp.mapping.abort(),
                    ['<CR>'] = cmp.mapping.confirm({ select = false }),
                    ['<Tab>'] = cmp.mapping(function(fallback)
                        if cmp.visible() then
                            cmp.select_next_item()
                        elseif luasnip.expandable() then
                            luasnip.expand({})
                        elseif luasnip.expand_or_jumpable() then
                            luasnip.expand_or_jump()
                        else
                            fallback()
                        end
                    end),
                    ['<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)
                }),
                sources = cmp.config.sources({
                    { name = 'nvim_lsp' },
                    { name = 'luasnip' },
                    { name = 'nvim_lua' },
                    { name = 'dictionary' },
                    { name = 'zsh' },
                    { name = 'doxygen' },
                }, {
                    { name = 'buffer' },
                    -- { name = 'spell' },
                })
            })

            -- Use LSP symbols and buffer source for `/`
            cmp.setup.cmdline('/', {
                mapping = cmp.mapping.preset.cmdline(),
                sources = cmp.config.sources({
                    { name = 'nvim_lsp_document_symbol' }
                }, {
                    { name = 'buffer' }
                })
            })

            -- Use cmdline & path source for ':'
            cmp.setup.cmdline(':', {
                mapping = cmp.mapping.preset.cmdline(),
                sources = cmp.config.sources({
                    { name = 'path' }
                }, {
                    { name = 'cmdline' }
                })
            })
        end
    },
}