A wind turbine blade comprising a shell, a carbon fibre-reinforced suction-side spar cap, a carbon fibre-reinforced pressure-side spar cap, at least a first shear web connected to the spar caps, one or more suction-side buckling reinforcement elements each being formed of a material different from the suction-side spar cap and being positioned on the interior surface of the suction-side spar cap and at a distance from the suction-side end of the first shear web, and one or more pressure-side buckling reinforcement elements each being formed of a material different from the pressure-side spar cap and being positioned on the interior surface of the pressure-side spar cap and at a distance from the pressure-side end of the first shear web.