Analysis in $\mathbb{Q}$

Calculus Level 3

It is a well-known theorem that if $f:\mathbb{R}\to\mathbb{R}$ is a differentiable function such that $f'(t)=0$ for all $t\in\mathbb{R}$ , then $f$ is constant.

Is it true that if $f:\mathbb{Q}\to\mathbb{Q}$ is a differentiable function such that $f'(t)=0$ for all $t\in\mathbb{Q}$ , then $f$ is constant?