Change tempo in the middle of song

I just recorded a song and realised i need the tempo needs to be faster during the solo part.
how can i change from 160bpm to 180bpm during only a part ?

I’m using hydrogen for the drums , 16.04 with kxstudio ppa added, running ardour 5.8

found it , had to make new track though couldnt change existing one

Hi Yor, I just started a song like yours. Check this: