diff --git a/coc-settings.json b/coc-settings.json
index af9f164..3fc46bc 100644
--- a/coc-settings.json
+++ b/coc-settings.json
@@ -17,26 +17,49 @@
 		"coc-tsserver",
 		"coc-lua",
 		"coc-sh",
-		"coc-go"
+		"coc-go",
+		"coc-prettier",
+		"coc-eslint",
+		"coc-markdownlint",
+		"coc-vimlsp"
 	],
 	"pyright.enable": true,
 	"python.analysis.autoImportCompletions": true,
 	"python.analysis.autoSearchPaths": true,
 	"python.analysis.diagnosticMode": "workspace",
+	"rust-analyzer.enable": true,
+	"rust-analyzer.cargo.loadOutDirsFromCheck": true,
+	"rust-analyzer.procMacro.enable": true,
+	"clangd.enabled": true,
+	"clangd.fallbackFlags": ["-std=c++17"],
+	"html.enable": true,
+	"css.enable": true,
+	"typescript.enable": true,
+	"javascript.enable": true,
+	"eslint.enable": true,
+	"prettier.enable": true,
 	"languageserver": {
 		"zig": {
 			"command": "zls",
 			"filetypes": ["zig"],
-			"rootPatterns": ["build.zig"]
+			"rootPatterns": ["build.zig", "build.zig.zon"],
+			"settings": {
+				"zls": {
+					"enable_snippets": true,
+					"enable_ast_check_diagnostics": true,
+					"enable_build_on_save": true,
+					"build_on_save_step": "check"
+				}
+			}
 		},
 		"nim": {
 			"command": "nimlangserver",
 			"filetypes": ["nim"],
 			"rootPatterns": ["*.nimble", "*.nim"],
-			"trace.server": "verbose",
 			"settings": {
 				"nim": {
-					"nimsuggestPath": "${pkgs.nim}/bin/nimsuggest"
+					"nimsuggestPath": "nimsuggest",
+					"timeout": 120000
 				}
 			}
 		},
@@ -44,6 +67,27 @@
 			"command": "vls",
 			"filetypes": ["v"],
 			"rootPatterns": ["v.mod"]
+		},
+		"lua": {
+			"command": "lua-language-server",
+			"filetypes": ["lua"],
+			"rootPatterns": [".luarc.json", ".luacheckrc", ".stylua.toml", "stylua.toml", "selene.toml"],
+			"settings": {
+				"Lua": {
+					"runtime": {
+						"version": "LuaJIT"
+					},
+					"diagnostics": {
+						"globals": ["vim"]
+					},
+					"workspace": {
+						"library": {
+							"${3rd}/luv/library": true,
+							"${3rd}/busted/library": true
+						}
+					}
+				}
+			}
 		}
 	}
 }
diff --git a/lua/coc.lua b/lua/coc.lua
index e69de29..eeb6d2f 100644
--- a/lua/coc.lua
+++ b/lua/coc.lua
@@ -0,0 +1,44 @@
+-- CoC configuration
+vim.g.coc_global_extensions = {
+	'coc-json',
+	'coc-html',
+	'coc-css',
+	'coc-python',
+	'coc-clangd',
+	'coc-rust-analyzer',
+	'coc-yaml',
+	'coc-tsserver',
+	'coc-lua',
+	'coc-sh',
+	'coc-go',
+	'coc-prettier',
+	'coc-eslint',
+	'coc-markdownlint',
+	'coc-vimlsp'
+}
+
+-- Use <Tab> and <S-Tab> to navigate completion list
+vim.keymap.set('i', '<Tab>', function()
+	if vim.fn['coc#pum#visible']() == 1 then
+		return vim.fn['coc#pum#next'](1)
+	else
+		return '<Tab>'
+	end
+end, { expr = true, silent = true })
+
+vim.keymap.set('i', '<S-Tab>', function()
+	if vim.fn['coc#pum#visible']() == 1 then
+		return vim.fn['coc#pum#prev'](1)
+	else
+		return '<S-Tab>'
+	end
+end, { expr = true, silent = true })
+
+-- Use <CR> to confirm completion
+vim.keymap.set('i', '<CR>', function()
+	if vim.fn['coc#pum#visible']() == 1 then
+		return vim.fn['coc#pum#confirm']()
+	else
+		return '<CR>'
+	end
+end, { expr = true, silent = true })
\ No newline at end of file
diff --git a/lua/utils/t3_functions.lua b/lua/utils/t3_functions.lua
index dc303fb..b462a6b 100644
--- a/lua/utils/t3_functions.lua
+++ b/lua/utils/t3_functions.lua
@@ -187,10 +187,11 @@ vim.api.nvim_create_user_command("Vsplit", function()
 end, {})
 
 function _G.ShowDocumentation()
-	if vim.fn.CocAction("hasProvider", "hover") then
-		vim.fn.CocActionAsync("doHover")
+	local filetype = vim.bo.filetype
+	if filetype == "vim" or filetype == "help" then
+		vim.cmd("h " .. vim.fn.expand("<cword>"))
 	else
-		vim.cmd("h " .. vim.bo.filetype)
+		vim.fn.CocActionAsync("doHover")
 	end
 end