diff --git a/default.nix b/default.nix
index e5f9ba0..99d0566 100644
--- a/default.nix
+++ b/default.nix
@@ -9,6 +9,7 @@ let
     ./syntax
     ./explorer
     ./theme
+    ./lsp
   ];
 
   basicConfig = builtins.readFile ./basic.lua;
diff --git a/lsp/config.lua b/lsp/config.lua
new file mode 100644
index 0000000..f000479
--- /dev/null
+++ b/lsp/config.lua
@@ -0,0 +1,66 @@
+local lsp_config = require 'lspconfig'
+
+-- always show signcolumns
+vim.opt.signcolumn = "yes"
+
+-- Mappings.
+-- See `:help vim.diagnostic.*` for documentation on any of the below functions
+local opts = { noremap=true, silent=true }
+vim.keymap.set('n', '<space>e', vim.diagnostic.open_float, opts)
+vim.keymap.set('n', '[c', vim.diagnostic.goto_prev, opts)
+vim.keymap.set('n', ']c', vim.diagnostic.goto_next, opts)
+vim.keymap.set('n', '<space>q', vim.diagnostic.setloclist, opts)
+
+-- Use an on_attach function to only map the following keys
+-- after the language server attaches to the current buffer
+local on_attach = function(client, bufnr)
+  -- Enable completion triggered by <c-x><c-o>
+  vim.api.nvim_buf_set_option(bufnr, 'omnifunc', 'v:lua.vim.lsp.omnifunc')
+
+  -- Mappings.
+  -- See `:help vim.lsp.*` for documentation on any of the below functions
+  local bufopts = { noremap=true, silent=true, buffer=bufnr }
+  vim.keymap.set('n', 'gD', vim.lsp.buf.declaration, bufopts)
+  vim.keymap.set('n', 'gd', vim.lsp.buf.definition, bufopts)
+  vim.keymap.set('n', 'gy', vim.lsp.buf.type_definition, bufopts)
+  vim.keymap.set('n', 'gr', vim.lsp.buf.references, bufopts)
+  vim.keymap.set('n', 'gi', vim.lsp.buf.implementation, bufopts)
+  vim.keymap.set('n', 'K', vim.lsp.buf.hover, bufopts)
+  vim.keymap.set('n', '<C-k>', vim.lsp.buf.signature_help, bufopts)
+  vim.keymap.set('n', '<space>wa', vim.lsp.buf.add_workspace_folder, bufopts)
+  vim.keymap.set('n', '<space>wr', vim.lsp.buf.remove_workspace_folder, bufopts)
+  vim.keymap.set('n', '<space>wl', function()
+    print(vim.inspect(vim.lsp.buf.list_workspace_folders()))
+  end, bufopts)
+  vim.keymap.set('n', '<localleader>n', vim.lsp.buf.rename, bufopts)
+  vim.keymap.set('n', '<localleader>a', vim.lsp.buf.code_action, bufopts)
+  vim.keymap.set('n', '<localleader>f', vim.lsp.buf.formatting, bufopts)
+end
+
+-------------------------------------------------------------------------------
+-- See: https://github.com/neovim/nvim-lspconfig/blob/master/doc/server_configurations.md
+--
+-- nix
+lsp_config.nil_ls.setup { on_attach = on_attach }
+
+--[[
+-- js,ts
+lsp_config.tsserver.setup { on_attach = on_attach }
+lsp_config.eslint.setup { on_attach = on_attach }
+
+-- rust
+lsp_config.rust_analyzer.setup {
+    on_attach = on_attach,
+    -- Server-specific settings...
+    settings = {
+      ["rust-analyzer"] = {
+        "server.path" = "rust-analyzer";
+        "updates.prompt" = false;
+        "updates.checkOnStartup" = false;
+        "checkOnSave.enable" = true;
+        "checkOnSave.command" = "clippy";
+        "cargo.autoreload" = true;
+      }
+    }
+}
+]]--
diff --git a/lsp/default.nix b/lsp/default.nix
new file mode 100644
index 0000000..8869b46
--- /dev/null
+++ b/lsp/default.nix
@@ -0,0 +1,11 @@
+{ vimPlugins, ... }:
+
+{
+  luaConfig = builtins.readFile ./config.lua;
+
+  plugins = [
+    vimPlugins.nvim-lspconfig
+    vimPlugins.nvim-cmp # auto-completion
+  ];
+}
+