diff --git a/lua/user/bufferline.lua b/lua/user/bufferline.lua
index 81015c5..7d98cf0 100644
--- a/lua/user/bufferline.lua
+++ b/lua/user/bufferline.lua
@@ -92,12 +92,12 @@ bufferline.setup {
     },
 
     close_button = {
-      guifg = { attribute = "fg", highlight = "TabLineSel" },
-      guibg = { attribute = "bg", highlight = "TabLineSel" },
+      guifg = { attribute = "fg", highlight = "TabLine" },
+      guibg = { attribute = "bg", highlight = "TabLine" },
     },
     close_button_visible = {
-      guifg = { attribute = "fg", highlight = "TabLineSel" },
-      guibg = { attribute = "bg", highlight = "TabLineSel" },
+      guifg = { attribute = "fg", highlight = "TabLine" },
+      guibg = { attribute = "bg", highlight = "TabLine" },
     },
     -- close_button_selected = {
     --   guifg = {attribute='fg',highlight='TabLineSel'},
diff --git a/lua/user/keymaps.lua b/lua/user/keymaps.lua
index b4d2195..638cab5 100644
--- a/lua/user/keymaps.lua
+++ b/lua/user/keymaps.lua
@@ -67,9 +67,5 @@ keymap("t", "<C-j>", "<C-\\><C-N><C-w>j", term_opts)
 keymap("t", "<C-k>", "<C-\\><C-N><C-w>k", term_opts)
 keymap("t", "<C-l>", "<C-\\><C-N><C-w>l", term_opts)
 
--- Comment
-keymap("n", "<leader>/", "<cmd>lua require('Comment').toggle()<CR>", opts)
-keymap("v", "<leader>/", ":lua require(\"Comment.api\").gc(vim.fn.visualmode())<cr>", opts)
-
 -- Nvimtree
 keymap("n", "<leader>e", ":NvimTreeToggle<cr>", opts)
diff --git a/lua/user/lsp/init.lua b/lua/user/lsp/init.lua
index a62e7aa..8158cf3 100644
--- a/lua/user/lsp/init.lua
+++ b/lua/user/lsp/init.lua
@@ -1,7 +1,8 @@
 local status_ok, _ = pcall(require, "lspconfig")
 if not status_ok then
-	return
+  return
 end
 
-require("user.lsp.lsp-installer")
+require "user.lsp.lsp-installer"
 require("user.lsp.handlers").setup()
+require "user.lsp.null-ls"
diff --git a/lua/user/lsp/null-ls.lua b/lua/user/lsp/null-ls.lua
new file mode 100644
index 0000000..874e19c
--- /dev/null
+++ b/lua/user/lsp/null-ls.lua
@@ -0,0 +1,19 @@
+local null_ls_status_ok, null_ls = pcall(require, "null-ls")
+if not null_ls_status_ok then
+	return
+end
+
+-- https://github.com/jose-elias-alvarez/null-ls.nvim/tree/main/lua/null-ls/builtins/formatting
+local formatting = null_ls.builtins.formatting
+-- https://github.com/jose-elias-alvarez/null-ls.nvim/tree/main/lua/null-ls/builtins/diagnostics
+local diagnostics = null_ls.builtins.diagnostics
+
+null_ls.setup({
+	debug = false,
+	sources = {
+		formatting.prettier.with({ extra_args = { "--no-semi", "--single-quote", "--jsx-single-quote" } }),
+		formatting.black.with({ extra_args = { "--fast" } }),
+		formatting.stylua,
+    -- diagnostics.flake8
+	},
+})
diff --git a/lua/user/plugins.lua b/lua/user/plugins.lua
index 530d7bf..614545c 100644
--- a/lua/user/plugins.lua
+++ b/lua/user/plugins.lua
@@ -71,6 +71,7 @@ return packer.startup(function(use)
   use "neovim/nvim-lspconfig" -- enable LSP
   use "williamboman/nvim-lsp-installer" -- simple to use language server installer
   use "tamago324/nlsp-settings.nvim" -- language server settings defined in json for
+  use "jose-elias-alvarez/null-ls.nvim" -- for formatters and linters
 
   -- Telescope
   use "nvim-telescope/telescope.nvim"