Unicode issue?

[yhs0602]

Traceback (most recent call last):
  File "/usr/local/bin/coded4", line 11, in <module>
    load_entry_point('coded4', 'console_scripts', 'coded4')()
  File "~/packages/coded4/coded4/__main__.py", line 20, in main
    print format_output(args.directory, contributors, args.output)
  File "~/packages/coded4/coded4/output.py", line 31, in format_output
    return output_func(repo_name, contribs, totals)
  File "~/packages/coded4/coded4/output.py", line 76, in output_table
    row = make_row(lambda key: to_str(c[key]))
  File "~/packages/coded4/coded4/output.py", line 66, in make_row
    for label, col_len in zip(labels, max_col_lens))
UnicodeDecodeError: 'ascii' codec can't decode byte 0xea in position 0: ordinal not in range(128)