iphone 4 ( can i update from 5.0.1 to 6.1.3 instead ios 7?

hello guys
im new here
i have an iphone 4 5.0.1 unlocked i want to upgrade to 6.1.3 not to ios 7 can i?
i search the web and i used ifaith to fetch what shsh blobs i have on device
i found shsh for : 4.3.5 and 5.0.1 and (6.1.3) ???
but i haven't been on 6.1.3 before ?
from 3 years my iphone is on 5.0.1
the question is : can i upgrade to 6.1.3 instead ios 7 or not?

sorry for bad english