  If Euclidean wormholes contribute meaningfully to the path integral of
quantum gravity they can have important implications for particle physics and
cosmology. The dominant effects arise from wormholes whose sizes are comparable
to the cut-off scale of effective field theory, for which ultraviolet
corrections become relevant. We study corrections to classical axion wormhole
solutions in string motivated scenarios in which the dilaton partner of the
axion becomes massive. We find corrections near the neck region which are
consistent with a recent version of the weak gravity conjecture for axions.
