How to anchor the player when they land after jumping?

As the titles says Im trying to make it so the player becomes anchored after they land from a jump. Instead the script only has a jump cooldown and does not anchor, I don't know where I went wrong. Here is my failed attempt.

local character = script.Parent

local JUMP_DEBOUNCE = 5

local root = character:WaitForChild("HumanoidRootPart")
local humanoid = character:WaitForChild("Humanoid")

local isJumping = root.Anchored

humanoid.StateChanged:Connect(function(oldState, newState)
    if newState == Enum.HumanoidStateType.Jumping then
        if not isJumping then
            isJumping = true
            humanoid:SetStateEnabled(Enum.HumanoidStateType.Jumping, false)
        end
    elseif newState == Enum.HumanoidStateType.Landed then
        if isJumping then
            isJumping = false
            wait(JUMP_DEBOUNCE)
            humanoid:SetStateEnabled(Enum.HumanoidStateType.Jumping, true)
        end
    end
end)