BIBO stability of $y(t)=\int_{-\infty}^{t}{x(\tau)d\tau}$

Question

How can I prove that the LTI system with (output $y(t)$, input $x(t)$)

$$y(t)=\int_{-\infty}^{t}{x(\tau)d\tau}$$

is BIBO stable?

Thank you in advance.