git+git://github.com/gunthercox/chatterbot-corpus@master#egg=chatterbot_corpus
mathparse>=0.1,<0.2
nltk>=3.2,<4.0
pint>=0.8.1
python-dateutil>=2.7,<2.8
pyyaml>=5.1,<5.2
spacy>=2.1,<2.2
sqlalchemy>=1.3,<1.4
pytz

git+git://github.com/gunthercox/chatterbot-corpus@master#egg=chatterbot_corpus
mathparse>=0.1,<0.2
nltk>=3.2,<4.0
pint>=0.8.1
python-dateutil>=2.7,<2.8
pyyaml>=5.3,<5.4
spacy>=2.1,<2.2
sqlalchemy>=1.3,<1.4
pytz

Update pyyaml to version 5.3.x
Update pyyaml to version 5.3.x
