Allow non-string headers.
Allow non-string headers.

jdecuyper/hyper,irvind/hyper,lawnmowerlatte/hyper,lawnmowerlatte/hyper,irvind/hyper,masaori335/hyper,masaori335/hyper,jdecuyper/hyper,Lukasa/hyper,Lukasa/hyper,plucury/hyper,plucury/hyper,fredthomsen/hyper,fredthomsen/hyper