Customize slider

Ik want to change the height of the slider. But if i paste this code in the css override it is not changing. Do u know what i did wrong?

}
.gk-is-wrapper-gk-hotel, .gk-is-wrapper-gk-hotel .gk-is-slide {
height: 500px;
max-width: 1240px;
}

www.tweestrijd.nu

Hi,

You can change the height of the slider in Customizer settings -> Header slider panel.

Thanks