  In this paper, I show that type I hilltop inflation under the current
observational constaints could have $M_P^2 \frac{V^{\prime\prime}}{V} \sim
-\mathcal{O}(10^{-2})$ in the parameter space which is in tension with the
refined swampland criteria. On the other hand, $M_P^2
\frac{V^{\prime\prime}}{V} \sim -\mathcal{O}(1)$ can be achieved if type I
hilltop inflation on the brane is considered.
