diff --git a/mods/formspec_edit/init.lua b/mods/formspec_edit/init.lua
index 484acd5..e0ea008 100644
--- a/mods/formspec_edit/init.lua
+++ b/mods/formspec_edit/init.lua
@@ -10,7 +10,8 @@ minetest.register_alias("mapgen_water_source", "air")
 --Variables
 local modpath = minetest.get_modpath("formspec_edit")
 local insecure_env = minetest.request_insecure_environment()
-local auto_update_time = 0.2 --seconds
+local update_time = 0.2 --seconds
+
 local error_formspec = [[
 formspec_version[4]
 size[8,2]
@@ -19,11 +20,17 @@ label[0.375,0.5;Error:formspec.spec is either ]
 label[0.375,1;non-existent,or empty]
 ]]
 
+--Crash if not singleplayer
+--TODO: hide the 'Host server' checkbox in main menu then possible
+if not minetest.is_singleplayer() then
+	error("[formspec_editor] This game doesn't work in multiplayer!")
+end
+
 --function declarations
 local update_formspec = nil
 local load_formspec = nil
-local auto_update = nil
 local turn_off_hud = nil
+local set_sky
 
 --Registrations
 
@@ -32,9 +39,8 @@ local turn_off_hud = nil
 -----------------------------------
 minetest.register_on_joinplayer(
 function(player_ref,_)
-    auto_update(player_ref:get_player_name())
-    turn_off_hud(player_ref)
-    set_sky(player_ref)
+	turn_off_hud(player_ref)
+	set_sky(player_ref)
 end
 )
 -----------------------------------
@@ -42,78 +48,82 @@ end
 -----------------------------------
 minetest.register_on_player_receive_fields(
 function(player_ref, _, fields)
-    if(fields.quit) then
-        minetest.request_shutdown()
-    end
-    update_formspec(player_ref:get_player_name())
+	if(fields.quit) then
+		minetest.request_shutdown()
+	end
+	update_formspec(player_ref:get_player_name())
 end
 )
 
 --function definitions
 
------------------------------------
---auto_update()
------------------------------------
-auto_update = function(player_name)
-    update_formspec(player_name)
-    minetest.after(auto_update_time,auto_update,player_name)
-end
-
 -----------------------------------
 --update_formspec()
 -----------------------------------
 update_formspec = function(player_name)
-    minetest.after(0.1,
-        function(player_name)
-            minetest.show_formspec(player_name, "fs", load_formspec())
-        end,
-        player_name)
+	minetest.after(0.1,
+		function(player_name)
+			minetest.show_formspec(player_name, "fs", load_formspec())
+		end,
+		player_name)
 end
 
 -----------------------------------
 --load_formspec()
 -----------------------------------
 load_formspec = function()
-    local io = insecure_env.io
-    local file = io.open(modpath .. "/formspec.spec", "rb")
-    if file == nil then
-        return error_formspec
-    else
-        local content = file:read("*all")
-        file:close()
-        if content == nil then
-            return error_formspec
-        else
-            return content
-        end
-    end
+	local io = insecure_env.io
+	local file = io.open(modpath .. "/formspec.spec", "rb")
+	if file == nil then
+		return error_formspec
+	else
+		local content = file:read("*all")
+		file:close()
+		if content == nil then
+			return error_formspec
+		else
+			return content
+		end
+	end
 end
 
 -----------------------------------
 --turn_off_hud()
 -----------------------------------
 turn_off_hud = function(player_ref)
-    local flags = {
-        hotbar = false,
-        healthbar = false,
-        crosshair = false,
-        wielditem = false,
-        breathbar = false,
-        minimap = false,
-        minimap_radar = false,
-    }
-    player_ref:hud_set_flags(flags)
+	local flags = {
+		hotbar = false,
+		healthbar = false,
+		crosshair = false,
+		wielditem = false,
+		breathbar = false,
+		minimap = false,
+		minimap_radar = false,
+	}
+	player_ref:hud_set_flags(flags)
 end
 
 -----------------------------------
 --set_sky()
 -----------------------------------
 set_sky = function(player_ref)
-    local sky = {
-        base_color = "#AAF",
-        type = "plain",
-        clouds = false,
-    }
-    player_ref:set_sky(sky)
-    player_ref:override_day_night_ratio(0)
-end
\ No newline at end of file
+	local sky = {
+		base_color = "#AAF",
+		type = "plain",
+		clouds = false,
+	}
+	player_ref:set_sky(sky)
+	player_ref:override_day_night_ratio(0)
+end
+
+local time = 0
+minetest.register_globalstep(function(dtime)
+	time = time + dtime
+	if time >= update_time then
+		local player = minetest.get_connected_players()[1]
+		if player then
+			update_formspec(player:get_player_name())
+		end
+		time = 0
+	end
+end)