What skills should I work upon to earn an internship?

During couple of months, our university is having their placement season ( they are offering internships in place of job offers ). Till now I haven't been provided with any offers in hand.

What do you guys think I should work upon to grab an internship ?

A short brief about me, I am a full stack developer with MERN stack and have till now worked with 4 companies as an intern adding up to 1 year of experience with these stacks.