
For your puppy you can only go with the flow. Hopefully the pup will look at you for guidance and as long as you act completely normal it should be ok if it is outgoing anyway.
I think a lot depends on the dogs temperament, I had the same fear with a pup years ago who lived with an older dog that was terrified, the pup grew up to be the most bomb proof dog I have ever had, although the ones since have never been scared of fireworks.
The only advice I can give is don't make an issue out of it.
Good Luck
Sandra