How do I detect a new update for a game?

So I'm trying to make a script that shows a gui once it detects that there is a new update. I'm trying to compare the update times although it keeps being the same. Here's the script. How could I fix this?

local Service = game:GetService("MarketplaceService"):GetProductInfo(494196891)
local Version = Service.Updated
local Version2
local Service2
while true do
	wait(1)
	print(1)
	Service2 = game:GetService("MarketplaceService"):GetProductInfo(494196891)
    Version2 = Service2.Updated
	print(Version)
	print(Version2)
	if Version ~= Version2 then
		local Players = game.Players:GetChildren()
		for _,v in pairs(Players) do
			v.PlayerGui.RestartPoll.Poll.Visible = true
		end
	end
end