Deploying to Heroku (is so easy)

[joedockrill]

Major new changes and features

There’s a change in PyTorch 1.6 to the file format that is used for saving models (see Deprecations). In fastai v1, in v1.0.63 we’re now setting a flag to tell PyTorch to continue to save models in the same format as before, to avoid compatibility problems. However, in fastai v2, it’ll save in the new PyTorch 1.6 format, since fastai v2 requires PyTorch 1.6 anyway.

pytorch 1.6 saves as a zip file, sounds like you’ve managed to update pytorch without updating fastai.

you could either

pip install fastai --upgrade

and export your model again if you’ve got the .pth file saved, or use pytorch 1.6 in your requirements.txt