Как отцентрировать flexbox-ом картинку по центру?

<div class="about">
				<div class="abou__item">
					<span>about</span>
					<img src="img/about1.jpg" alt="">
				</div>
				<div class="abou__item">
					<img src="img/about2.jpg" alt="">
					<span>about</span>
				</div>
				<div class="abou__item">
					<span>about</span>
					<img src="img/about3.jpg" alt="">
				</div>
				<div class="abou__item">
					<span>about</span>
					<img src="img/about4.jpg" alt="">
				</div>
		</div>

.about {
	display: flex;
	flex-direction: column;
	align-items: center;
}