Assuming libtiff was installed via homebrew, you have an up to date installation (brew upgrade libtiff), and that version is linked: brew switch libtiff 4.0.9_3, please check that the dylib version is what it should be:
otool -L /usr/local/opt/libtiff/lib/libtiff.5.dylib
/usr/local/opt/libtiff/lib/libtiff.5.dylib:
/usr/local/opt/libtiff/lib/libtiff.5.dylib (compatibility version 9.0.0, current version 9.0.0)
/usr/local/opt/xz/lib/liblzma.5.dylib (compatibility version 8.0.0, current version 8.3.0)
/usr/local/opt/jpeg/lib/libjpeg.9.dylib (compatibility version 13.0.0, current version 13.0.0)
/usr/lib/libz.1.dylib (compatibility version 1.0.0, current version 1.2.11)
/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1252.50.4)
If this is correct, please report the output of
brew doctor