Why isnt this part position script working properly?

This script is placed inside a part with the goal of making this part move up one stud per second:

local xValue = 0
local yValue = 1
local zValue = 0
while true do
	script.Parent.Position = Vector3(xValue, yValue + 1, zValue)
	wait(1)
end

However, this error keeps popping up: Workspace.Part.#2:7: attempt to call global 'Vector3' (a table value) Any idea what is wrong?