How do I apply a different WalkSpeed to a Player? [Answered]

I'm trying to make a perk for my game which gives the player +10% WalkSpeed, but it doesn't really work. I don't know how I should change it either, whether it is through inserting a Humanoid into players or using LocalPlayer.character. Here is my code:

EquipButton.MouseButton1Down:connect(function()
    if InventoryItemImage.Image == "rblxassetid://769111505" then
        local HumanoidSpeed = game.Players.LocalPlayer.Character.Humanoid.WalkSpeed
        if wins.Value >= 50 then
            HumanoidSpeed = HumanoidSpeed * 2
        elseif wins.Value >= 45 then
            HumanoidSpeed = HumanoidSpeed * 1.9
        elseif wins.Value >= 40 then
            HumanoidSpeed = HumanoidSpeed * 1.8
        elseif wins.Value >= 35 then
            HumanoidSpeed = HumanoidSpeed * 1.7
        elseif wins.Value >= 30 then
            HumanoidSpeed = HumanoidSpeed * 1.6
        elseif wins.Value >= 25 then
            HumanoidSpeed = HumanoidSpeed * 1.5
        elseif wins.Value >= 20 then
            HumanoidSpeed = HumanoidSpeed * 1.4
        elseif wins.Value >= 15 then
            HumanoidSpeed = HumanoidSpeed * 1.3
        elseif wins.Value >= 10 then
            HumanoidSpeed = HumanoidSpeed * 1.2
        elseif wins.Value >= 5 then
            HumanoidSpeed = HumanoidSpeed * 1.1
        end
    end
end)

There also aren't any errors. Any help is appreciated!