diff --git a/README.md b/README.md
index d3733bb..d27629d 100644
--- a/README.md
+++ b/README.md
@@ -24,8 +24,11 @@ https://github.com/katono/rogue.vim
 
 ## Requirements
 
-rogue.vim requires Lua-enabled Vim.
-Check `:echo has('lua')` returns 1 and `:echo luaeval('_VERSION')` returns `Lua 5.1` or later.
+rogue.vim requires Lua-enabled Vim or neovim.
+Please make sure that at least one of the following conditions is met.
+
+- `:echo has('lua')` returns 1 and `:echo luaeval('_VERSION')` returns `Lua 5.1` or later.
+- `:echo has('nvim')` returns 1 and `:echo luaeval('_VERSION')` returns `Lua 5.1` or later.
 
 LuaJIT is recommended because that is very fast.
 
diff --git a/autoload/rogue/curses.lua b/autoload/rogue/curses.lua
index 442ca49..de2b4f2 100644
--- a/autoload/rogue/curses.lua
+++ b/autoload/rogue/curses.lua
@@ -75,7 +75,7 @@ end
 
 function g.refresh()
 	if vim then
-		vim.command("normal gg")
+		g.vim_command("normal gg")
 	end
 	local update = false
 	local done_redraw = false
@@ -87,17 +87,17 @@ function g.refresh()
 			row_str = dungeon_row(i):sub(1, dungeon_str_buffer[i].col)
 		end
 		if vim then
-			if i == g.DROWS-1 and vim.eval("&lines") == g.DROWS then
+			if i == g.DROWS-1 and g.vim_eval("&lines") == g.DROWS then
 				row_str = row_str .. dungeon_str_buffer[i].str
 				if g.update_flag or row_str ~= last_print_area then
-					vim.command("redraw")
-					print((vim.eval("has('gui_running')") ~= 0 and '' or ' ') .. row_str)
-					vim.command("redrawstatus")
+					g.vim_command("redraw")
+					print((g.vim_eval("has('gui_running')") ~= 0 and '' or ' ') .. row_str)
+					g.vim_command("redrawstatus")
 					last_print_area = row_str
 					done_redraw = true
 				end
 			else
-				if g.update_flag and i == 0 and vim.eval("&lines") > g.DROWS then
+				if g.update_flag and i == 0 and g.vim_eval("&lines") > g.DROWS then
 					print(' ')
 				end
 				if dungeon_str_buffer[i].str ~= '' then
@@ -111,7 +111,7 @@ function g.refresh()
 				if g.update_flag or row_str ~= last_row_str[i] then
 					local cmd_str
 					cmd_str = 'call setline(' .. tostring(i + 1) .. ', "' .. row_str .. '")'
-					vim.command(cmd_str)
+					g.vim_command(cmd_str)
 					last_row_str[i] = row_str
 					update = true
 				end
@@ -124,6 +124,6 @@ function g.refresh()
 	end
 	g.update_flag = false
 	if update and not done_redraw then
-		vim.command("redraw")
+		g.vim_command("redraw")
 	end
 end
diff --git a/autoload/rogue/debug.lua b/autoload/rogue/debug.lua
index 2a2fae7..7db4d88 100644
--- a/autoload/rogue/debug.lua
+++ b/autoload/rogue/debug.lua
@@ -23,7 +23,7 @@ function g.msgbox(fmt, ...)
 	if not g.DEBUG or not vim then
 		return
 	end
-	vim.eval("confirm('" .. string.format(fmt, ...) .. "')")
+	g.vim_eval("confirm('" .. string.format(fmt, ...) .. "')")
 end
 
 function g.log(fmt, ...)
@@ -178,7 +178,7 @@ function g.breakpoint(log_flag)
 	local level = 2
 	local prompt = '\n'..g.__FILE_LINE__(level)..'\n'..'Breakpoint: '
 	while true do
-		local input = vim.eval('input("'..prompt..'", "", "tag")')
+		local input = g.vim_eval('input("'..prompt..'", "", "tag")')
 		if input == '' then
 			break
 		end
diff --git a/autoload/rogue/init.lua b/autoload/rogue/init.lua
index a4ffd4a..c51689d 100644
--- a/autoload/rogue/init.lua
+++ b/autoload/rogue/init.lua
@@ -29,7 +29,7 @@ local function set_nick_name()
 	end
 	local default_name = g.mesg[542]
 	if vim then
-		g.nick_name = vim.eval('inputdialog("'..g.mesg[13]..' ", "'..default_name..'")')
+		g.nick_name = g.vim_eval('inputdialog("'..g.mesg[13]..' ", "'..default_name..'")')
 		if g.nick_name == '' then
 			g.nick_name = default_name
 		end
diff --git a/autoload/rogue/main.lua b/autoload/rogue/main.lua
index 26de4ae..b408e9f 100644
--- a/autoload/rogue/main.lua
+++ b/autoload/rogue/main.lua
@@ -7,7 +7,7 @@ end
 Rogue = {}
 local g = Rogue -- alias
 
-g.version = '1.0.2'
+g.version = '1.0.3'
 
 -- Checks added global data is Rogue only
 local function check_global()
@@ -38,9 +38,9 @@ local function init_dirs()
 		g.game_dir = g.game_dir:gsub('\\', '/')
 		g.game_dir = g.game_dir:gsub('~', g.home_dir)
 		if vim then
-			local exists = vim.eval('isdirectory("' .. g.game_dir .. '")')
+			local exists = g.vim_eval('isdirectory("' .. g.game_dir .. '")')
 			if exists == 0 then
-				vim.command('call mkdir("' .. g.game_dir .. '", "p")')
+				g.vim_command('call mkdir("' .. g.game_dir .. '", "p")')
 			end
 		end
 	end
@@ -118,11 +118,11 @@ local function read_mesg()
 		local needs_iconv = g.get_vim_variable("s:needs_iconv")
 		if needs_iconv ~= 0 then
 			g.needs_iconv = true
-			vim.command('let &encoding = "utf-8"')
+			g.vim_command('let &encoding = "utf-8"')
 			for k, v in pairs(g.mesg) do
 				g.mesg[k] = g.iconv_from_utf8(v)
 			end
-			vim.command('let &encoding = s:save_encoding')
+			g.vim_command('let &encoding = s:save_encoding')
 		end
 	end
 	return true
@@ -134,8 +134,8 @@ local function main()
 		return
 	end
 	if vim then
-		if vim.eval("&columns") < g.DCOLS or vim.eval("&lines") < g.DROWS then
-			vim.eval('confirm("' .. g.mesg[14] .. '")')
+		if g.vim_eval("&columns") < g.DCOLS or g.vim_eval("&lines") < g.DROWS then
+			g.vim_eval('confirm("' .. g.mesg[14] .. '")')
 			return
 		end
 	end
diff --git a/autoload/rogue/mesg b/autoload/rogue/mesg
index ab46ff6..14124b3 100644
--- a/autoload/rogue/mesg
+++ b/autoload/rogue/mesg
@@ -725,3 +725,7 @@ do_args()
 file: rogue.vim
 rogue#rogue#main
 544	"ゲームが中断されています。再開しますか？"	"The game is suspended. Resume it?"
+
+file: play.lua
+doshell()
+545	":sh コマンドはサポートされていません"	":sh command is not supported"
diff --git a/autoload/rogue/mesg_E b/autoload/rogue/mesg_E
index 8532049..c072c32 100644
--- a/autoload/rogue/mesg_E
+++ b/autoload/rogue/mesg_E
@@ -724,3 +724,7 @@ do_args()
 file: rogue.vim
 rogue#rogue#main
 544	"The game is suspended. Resume it?"	"ゲームが中断されています。再開しますか？"
+
+file: play.lua
+doshell()
+545	":sh command is not supported"	":sh コマンドはサポートされていません"
diff --git a/autoload/rogue/message.lua b/autoload/rogue/message.lua
index b8ca2a1..0860390 100644
--- a/autoload/rogue/message.lua
+++ b/autoload/rogue/message.lua
@@ -20,7 +20,7 @@ end
 function g.rgetchar()
 	local n
 	if vim then
-		n = vim.eval("getchar()")
+		n = g.vim_eval("getchar()")
 	else
 		os.execute("stty -echo cbreak")
 		n = string.byte(io.stdin:read(1))
@@ -29,7 +29,7 @@ function g.rgetchar()
 	local c = ''
 	if type(n) == 'string' then
 		if vim then
-			if n == vim.eval('"\\<BS>"') then
+			if n == g.vim_eval('"\\<BS>"') then
 				c = 'BS'
 			end
 		end
@@ -44,7 +44,7 @@ function g.rgetchar()
 			end
 		else
 			if vim then
-				c = vim.eval("nr2char("..tostring(n)..")")
+				c = g.vim_eval("nr2char("..tostring(n)..")")
 			elseif n <= 0x7E then
 				c = string.char(n)
 			end
@@ -205,7 +205,5 @@ function g.clear_stats()
 end
 
 function g.sound_bell()
-	if vim then
-		vim.beep()
-	end
+	g.vim_beep()
 end
diff --git a/autoload/rogue/play.lua b/autoload/rogue/play.lua
index a7c5352..faeeda8 100644
--- a/autoload/rogue/play.lua
+++ b/autoload/rogue/play.lua
@@ -64,7 +64,12 @@ end
 
 local function doshell()
 	if vim then
-		vim.command("sh")
+		if g.vim_eval("exists(':shell')") == 0 then
+			-- :shell command is removed in neovim.
+			g.message(g.mesg[545])
+		else
+			g.vim_command("sh")
+		end
 	end
 end
 
diff --git a/autoload/rogue/rogue.vim b/autoload/rogue/rogue.vim
index 165edf2..bcb4072 100644
--- a/autoload/rogue/rogue.vim
+++ b/autoload/rogue/rogue.vim
@@ -2,7 +2,7 @@
 let s:FILE_DIR = fnamemodify(expand("<sfile>"), ':h') . '/'
 let s:FILE_DIR = substitute(s:FILE_DIR, '\\', '/', 'g')
 function! rogue#rogue#main(args)
-	if !has('lua')
+	if !has('lua') && !(has('nvim') && exists('*luaeval') && luaeval('vim.api ~= nil'))
 		echo "Sorry. Rogue.vim needs '+lua'."
 		return
 	endif
diff --git a/autoload/rogue/save.lua b/autoload/rogue/save.lua
index d0a9536..fadee1b 100644
--- a/autoload/rogue/save.lua
+++ b/autoload/rogue/save.lua
@@ -114,9 +114,9 @@ function g.restore(fname)
 	end
 	g.xxx(true)
 	buf = g.xxxx(buf)
-	vim.command('let &encoding = "utf-8"')
+	g.vim_command('let &encoding = "utf-8"')
 	buf = g.iconv_from_utf8(buf)
-	vim.command('let &encoding = s:save_encoding')
+	g.vim_command('let &encoding = s:save_encoding')
 	local Rogue_copy = assert(g.loadstring('return ' .. buf), g.mesg[508])()
 
 	if g.home_dir ~= Rogue_copy.home_dir then
diff --git a/autoload/rogue/score.lua b/autoload/rogue/score.lua
index 2bdc62d..b138dab 100644
--- a/autoload/rogue/score.lua
+++ b/autoload/rogue/score.lua
@@ -345,9 +345,9 @@ function g.put_scores(monster, other)
 		local buf = fp:read("*a")
 		g.xxx(true)
 		buf = g.xxxx(buf)
-		vim.command('let &encoding = "utf-8"')
+		g.vim_command('let &encoding = "utf-8"')
 		buf = g.iconv_from_utf8(buf)
-		vim.command('let &encoding = s:save_encoding')
+		g.vim_command('let &encoding = s:save_encoding')
 		scores = assert(g.loadstring('return ' .. buf), g.mesg[199])()
 		fp:close()
 	end
diff --git a/autoload/rogue/util.lua b/autoload/rogue/util.lua
index bf8ec36..693e4a2 100644
--- a/autoload/rogue/util.lua
+++ b/autoload/rogue/util.lua
@@ -7,10 +7,41 @@ else
 	g.loadstring = loadstring
 end
 
+if vim.api then
+	function g.vim_beep()
+		vim.api.nvim_command('silent normal! <C-g>')
+	end
+	function g.vim_eval(var)
+		return vim.api.nvim_eval(var)
+	end
+	function g.vim_command(cmd)
+		return vim.api.nvim_command(cmd)
+	end
+elseif vim then
+	function g.vim_beep()
+		vim.beep()
+	end
+	function g.vim_eval(var)
+		return vim.eval(var)
+	end
+	function g.vim_command(cmd)
+		return vim.command(cmd)
+	end
+else
+	function g.vim_beep()
+	end
+	function g.vim_eval(var)
+		return nil
+	end
+	function g.vim_command(var)
+		return nil
+	end
+end
+
 function g.get_vim_variable(var)
 	if vim then
-		if vim.eval("exists('" .. var .. "')") ~= 0 then
-			return vim.eval(var)
+		if g.vim_eval("exists('" .. var .. "')") ~= 0 then
+			return g.vim_eval(var)
 		end
 	end
 	return ''
@@ -49,9 +80,9 @@ end
 function g.set_vim_variable(var, value)
 	if vim then
 		if type(value) == 'number' then
-			vim.command('let ' .. var .. ' = ' .. tostring(value))
+			g.vim_command('let ' .. var .. ' = ' .. tostring(value))
 		elseif type(value) == 'string' then
-			vim.command('let ' .. var .. ' = "' .. value .. '"')
+			g.vim_command('let ' .. var .. ' = "' .. value .. '"')
 		end
 	end
 end
@@ -131,7 +162,7 @@ end
 function g.strwidth(s)
 	local len
 	if vim then
-		len = vim.eval('strwidth("' .. s .. '")')
+		len = g.vim_eval('strwidth("' .. s .. '")')
 	else
 		len = #s
 	end
@@ -141,7 +172,7 @@ end
 function g.getftime(fname)
 	local t
 	if vim then
-		t = vim.eval('getftime("' .. fname .. '")')
+		t = g.vim_eval('getftime("' .. fname .. '")')
 	else
 		t = -1
 	end
@@ -169,7 +200,7 @@ end
 
 function g.msleep(n)
 	if vim then
-		vim.command('sleep ' .. tostring(n) .. 'm')
+		g.vim_command('sleep ' .. tostring(n) .. 'm')
 	end
 end
 
@@ -198,7 +229,7 @@ end
 function g.iconv_from_utf8(str)
 	if g.needs_iconv then
 		str = str:gsub("'", "''")
-		str = vim.eval("iconv('" .. str .. "', 'utf-8', s:save_encoding)")
+		str = g.vim_eval("iconv('" .. str .. "', 'utf-8', s:save_encoding)")
 	end
 	return str
 end
@@ -206,7 +237,7 @@ end
 function g.iconv_to_utf8(str)
 	if g.needs_iconv then
 		str = str:gsub("'", "''")
-		str = vim.eval("iconv('" .. str .. "', s:save_encoding, 'utf-8')")
+		str = g.vim_eval("iconv('" .. str .. "', s:save_encoding, 'utf-8')")
 	end
 	return str
 end
diff --git a/doc/rogue.jax b/doc/rogue.jax
index 9d32ef1..446157c 100644
--- a/doc/rogue.jax
+++ b/doc/rogue.jax
@@ -1,6 +1,6 @@
 *rogue.txt*	データ分離版ローグ・クローンIIの移植
 
-Version: 1.0.2
+Version: 1.0.3
 Author: KATO Noriaki <katono123@gmail.com>
 License: MIT License
 
diff --git a/doc/rogue.txt b/doc/rogue.txt
index ad476e4..5eefb25 100644
--- a/doc/rogue.txt
+++ b/doc/rogue.txt
@@ -1,6 +1,6 @@
 *rogue.txt*	Porting of Rogue-clone II for Vim
 
-Version: 1.0.2
+Version: 1.0.3
 Author: KATO Noriaki <katono123@gmail.com>
 License: MIT License