diff --git a/wezterm.lua b/wezterm.lua
index c2f81bf..7a97206 100644
--- a/wezterm.lua
+++ b/wezterm.lua
@@ -248,6 +248,19 @@ local function show_font_settings(window, pane)
 	)
 end
 
+local function escape_pattern(s)
+	return (s:gsub("[%^%$%(%)%.%[%]%*%+%-%?%%]", "%%%1"))
+end
+
+-- "host:port" 형태의 remote_address를 host, port로 분리 (port 없으면 port는 nil)
+local function split_remote_address(remote_address)
+	local host, port = remote_address:match("^(.-):(%d+)$")
+	if host then
+		return host, port
+	end
+	return remote_address, nil
+end
+
 local function append_ssh_domain(window, pane, name, remote_address, username)
 	local text, err = read_config_text()
 	if not text then
@@ -273,13 +286,42 @@ local function append_ssh_domain(window, pane, name, remote_address, username)
 	window:perform_action(act.ReloadConfiguration, pane)
 end
 
--- SSH 도메인 등록을 이름 -> 주소 -> 사용자명 순서로 한 칸씩 물어봄
+local function update_ssh_domain(window, pane, old_name, name, remote_address, username)
+	local text, err = read_config_text()
+	if not text then
+		notify(window, err)
+		return
+	end
+
+	local quoted_old_name = escape_pattern(string.format("%q", old_name))
+	local pattern = "\t{\n\t\tname = " .. quoted_old_name .. ",\n\t\tremote_address = %b\"\",\n\t\tusername = %b\"\",\n\t},\n"
+	local entry = string.format('\t{\n\t\tname = %q,\n\t\tremote_address = %q,\n\t\tusername = %q,\n\t},\n', name, remote_address, username)
+	local safe_entry = entry:gsub("%%", "%%%%")
+
+	local updated, count = text:gsub(pattern, safe_entry, 1)
+	if count == 0 then
+		notify(window, "SSH 도메인 항목을 찾지 못했습니다: " .. old_name)
+		return
+	end
+
+	local ok, write_err = write_config_text(updated)
+	if not ok then
+		notify(window, write_err)
+		return
+	end
+
+	notify(window, "SSH 도메인 수정됨: " .. name .. " -> " .. remote_address .. " (WezTerm을 완전히 재시작해야 반영됩니다)")
+	window:perform_action(act.ReloadConfiguration, pane)
+end
+
+-- SSH 도메인 등록을 이름 -> 주소 -> 포트 -> 사용자명 순서로 한 칸씩 물어봄
 -- (WezTerm에는 입력칸을 여러 개 한 화면에 배치하는 폼 위젯이 없어, 한 줄짜리
 -- PromptInputLine을 단계별로 이어서 띄우는 방식으로 흉내낸다)
 local ssh_domain_steps = {
-	{ field = "name", title = "SSH 이름 (1/3, 예: prod)" },
-	{ field = "remote_address", title = "SSH 주소 (2/3, 예: myserver.example.com)" },
-	{ field = "username", title = "SSH 사용자명 (3/3, 예: ubuntu)" },
+	{ field = "name", title = "SSH 이름 (1/4, 예: prod)" },
+	{ field = "host", title = "SSH 주소 (2/4, 예: myserver.example.com)" },
+	{ field = "port", title = "SSH 포트 (3/4, 비워두면 기본값 22)", optional = true },
+	{ field = "username", title = "SSH 사용자명 (4/4, 예: ubuntu)" },
 }
 
 local function prompt_ssh_domain_step(window, pane, step_index, data)
@@ -289,17 +331,21 @@ local function prompt_ssh_domain_step(window, pane, step_index, data)
 		act.PromptInputLine({
 			description = step.title,
 			action = wezterm.action_callback(function(cb_window, cb_pane, line)
-				if not line or line == "" then
+				if (not line or line == "") and not step.optional then
 					notify(cb_window, "SSH 도메인 추가를 취소했습니다")
 					return
 				end
 
-				data[step.field] = line
+				data[step.field] = line or ""
 
 				if step_index < #ssh_domain_steps then
 					prompt_ssh_domain_step(cb_window, cb_pane, step_index + 1, data)
 				else
-					append_ssh_domain(cb_window, cb_pane, data.name, data.remote_address, data.username)
+					local remote_address = data.host
+					if data.port ~= "" then
+						remote_address = remote_address .. ":" .. data.port
+					end
+					append_ssh_domain(cb_window, cb_pane, data.name, remote_address, data.username)
 				end
 			end),
 		}),
@@ -311,6 +357,96 @@ local function prompt_ssh_domain(window, pane)
 	prompt_ssh_domain_step(window, pane, 1, {})
 end
 
+-- SSH 도메인 수정: 기존 값은 비워두면 그대로 유지, 입력하면 해당 항목만 교체
+local edit_ssh_domain_steps = {
+	{ field = "name", label = "SSH 이름" },
+	{ field = "host", label = "SSH 주소" },
+	{ field = "port", label = "SSH 포트" },
+	{ field = "username", label = "SSH 사용자명" },
+}
+
+local function prompt_edit_ssh_domain_step(window, pane, step_index, data)
+	local step = edit_ssh_domain_steps[step_index]
+	local current_display = data[step.field]
+	if step.field == "port" and current_display == "" then
+		current_display = "기본값 22"
+	end
+
+	window:perform_action(
+		act.PromptInputLine({
+			description = string.format(
+				"%s (%d/%d, 현재: %s, 비워두면 유지)",
+				step.label,
+				step_index,
+				#edit_ssh_domain_steps,
+				current_display
+			),
+			action = wezterm.action_callback(function(cb_window, cb_pane, line)
+				if line and line ~= "" then
+					data[step.field] = line
+				end
+
+				if step_index < #edit_ssh_domain_steps then
+					prompt_edit_ssh_domain_step(cb_window, cb_pane, step_index + 1, data)
+				else
+					local remote_address = data.host
+					if data.port ~= "" then
+						remote_address = remote_address .. ":" .. data.port
+					end
+					update_ssh_domain(cb_window, cb_pane, data.original_name, data.name, remote_address, data.username)
+				end
+			end),
+		}),
+		pane
+	)
+end
+
+local function prompt_edit_ssh_domain(window, pane, domain)
+	local host, port = split_remote_address(domain.remote_address)
+	prompt_edit_ssh_domain_step(window, pane, 1, {
+		original_name = domain.name,
+		name = domain.name,
+		host = host,
+		port = port or "",
+		username = domain.username,
+	})
+end
+
+local function show_edit_ssh_domain_list(window, pane)
+	local choices = {}
+	for _, domain in ipairs(config.ssh_domains or {}) do
+		table.insert(choices, {
+			label = domain.name .. " (" .. domain.remote_address .. ")",
+			id = domain.name,
+		})
+	end
+
+	if #choices == 0 then
+		notify(window, "등록된 SSH 도메인이 없습니다")
+		return
+	end
+
+	window:perform_action(
+		act.InputSelector({
+			title = "SSH 도메인 수정",
+			fuzzy = true,
+			choices = choices,
+			action = wezterm.action_callback(function(inner_window, inner_pane, id)
+				if not id then
+					return
+				end
+				for _, domain in ipairs(config.ssh_domains or {}) do
+					if domain.name == id then
+						prompt_edit_ssh_domain(inner_window, inner_pane, domain)
+						return
+					end
+				end
+			end),
+		}),
+		pane
+	)
+end
+
 local function show_connection_settings(window, pane)
 	window:perform_action(
 		act.InputSelector({
@@ -318,12 +454,15 @@ local function show_connection_settings(window, pane)
 			fuzzy = true,
 			choices = {
 				{ label = "SSH 도메인 추가", id = "add_ssh" },
+				{ label = "SSH 도메인 수정", id = "edit_ssh" },
 				{ label = "SSH 도메인 목록", id = "domains" },
 				{ label = "통합 런처", id = "launcher" },
 			},
 			action = wezterm.action_callback(function(inner_window, inner_pane, id)
 				if id == "add_ssh" then
 					prompt_ssh_domain(inner_window, inner_pane)
+				elseif id == "edit_ssh" then
+					show_edit_ssh_domain_list(inner_window, inner_pane)
 				elseif id == "domains" then
 					inner_window:perform_action(act.ShowLauncherArgs({ flags = "DOMAINS" }), inner_pane)
 				elseif id == "launcher" then