CLI does not perform tilde expansion

[sneakypete81]

trovebox -c test -X POST -e /photo/upload.json -F photo=@~/Pictures/opmeqnqXBX-28cbef_960x180.jpg
Traceback (most recent call last):
  File "/usr/local/bin/trovebox", line 9, in <module>
    load_entry_point('trovebox==0.5', 'console_scripts', 'trovebox')()
  File "/usr/local/lib/python2.7/dist-packages/trovebox/main.py", line 90, in main
    params, files = extract_files(params)
  File "/usr/local/lib/python2.7/dist-packages/trovebox/main.py", line 126, in extract_files
    files[name] = open(params[name][1:], 'rb')
IOError: [Errno 2] No such file or directory: '~/Pictures/opmeqnqXBX-28cbef_960x180.jpg'

But it works if /home/pete/file.jpg is used instead of ~/file.jpg