Deploying PKL file to heroku

Part 1 (2019)
1

Hi, has anyone deployed your pkl file to heroku ? I have tried but I was unable to do it due to large slug size. I think its because I need to download the fastai dependencies.

However when i try to load the pkl model as a pkl instead of

load_learner('./Pneumonia_Predictor_first_optim.pkl')

i get :
model = pickle.load(open('./Pneumonia_Predictor_first_optim.pkl','rb'))

runcell(0, '/Users/shayyyyyy/Desktop/mlsite/predictor.py')
Traceback (most recent call last):

  File "/Users/shayyyyyy/Desktop/mlsite/predictor.py", line 21, in <module>
    model = pickle.load(open('./Pneumonia_Predictor_first_optim.pkl','rb'))

UnpicklingError: A load persistent id instruction was encountered,
but no persistent_load function was specified.

Any solutions ?