Control the type 1 error

#1
Hello, everyone!

In my reasearch I have two primary endpoints - overall survival and progression-free survival. I test the superiority hypothesis H0: hazard ratio more than superiority margin and Ha is hazard ratio is less than superiority margin. And my question is: What method of control type I error may used if I want to prove two hypotheses of superiority at the same time (simultaneously)?

Many thanks!