Umlauts/vowel mutation in text not printed correctly

[ClimbTheWorld]

Hi, When I send a postcard and use umlauts/vowel mutations ä/ö/ü they are printed not correctly, tried using: postcards send --config config.json -p .\pic.jpg -m "Was für eine cooles repo!" and using the postcards-yaml variant in a yaml file which was saved using UTF-8. How could I achieve it?

[abertschi]

Im sorry for the delayed reply. Can you give an example to reproduce the issue. In which input field do you use umlaute? in the example above there are none.

[ClimbTheWorld]

There is a 'ü' in 'für' in the message.