diff --git a/init.lua b/init.lua
index 780a894..75f589a 100644
--- a/init.lua
+++ b/init.lua
@@ -39,7 +39,6 @@ local config = {
     --   Normal = { bg = "#000000" },
     -- },
   },
-
   -- set vim options here (vim.<first_key>.<second_key> =  value)
   options = {
     opt = {
@@ -225,16 +224,17 @@ local config = {
       --   end,
       -- },
 
+      -- themes
       {
-	      "catppuccin/nvim",
-	      as = "catppuccin",
-	      config = function()
-		      vim.g.catppuccin_flavour = "macchiato" -- latte, frappe, macchiato, mocha
-		      require("catppuccin").setup()
-		      vim.api.nvim_command "colorscheme catppuccin"
-	      end
+        "catppuccin/nvim",
+        as = "catppuccin",
+        config = function()
+          vim.g.catppuccin_flavour = "macchiato" -- latte, frappe, macchiato, mocha
+          require("catppuccin").setup()
+          vim.api.nvim_command "colorscheme catppuccin"
+        end,
       },
-      { 'folke/tokyonight.nvim' }
+      { "folke/tokyonight.nvim" },
     },
     -- All other entries override the require("<key>").setup({...}) call for default plugins
     ["null-ls"] = function(config) -- overrides `require("null-ls").setup(config)`
@@ -256,11 +256,40 @@ local config = {
     },
     -- use mason-lspconfig to configure LSP installations
     ["mason-lspconfig"] = { -- overrides `require("mason-lspconfig").setup(...)`
-      -- ensure_installed = { "sumneko_lua" },
+      -- see https://github.com/williamboman/mason-lspconfig.nvim for the available servers list
+      ensure_installed = {
+        "ansiblels",
+        "arduino_language_server",
+        "bashls",
+        "clangd",
+        "cmake",
+        "cssls",
+        "dockerls",
+        "gopls",
+        "html",
+        "jsonls",
+        "lemminx",
+        "marksman",
+        "phpactor",
+        "perlnavigator",
+        "pyright",
+        "quick_lint_js",
+        "sqlls",
+        "sumneko_lua",
+        "taplo",
+        "yamlls",
+      },
     },
     -- use mason-null-ls to configure Formatters/Linter installation for null-ls sources
     ["mason-null-ls"] = { -- overrides `require("mason-null-ls").setup(...)`
-      -- ensure_installed = { "prettier", "stylua" },
+      -- see https://github.com/jayp0521/mason-null-ls.nvim for the available sources
+      ensure_installed = {
+        "gitlint",
+        "hadolint",
+        "prettier",
+        "shellcheck",
+        "stylua",
+      },
     },
   },