Python Pipfile 's package/dependencies is not installed

Hello, 

I've been following this guide Deployment with Python pipenv, but keep getting this error, as the dependencies in my Pipfile weren't installed at Zyte Cloud.

Fyi: I can run it locally on my PC.

Error

    raise ConfigurationError('The "dnspython" module must be ' pymongo.errors.ConfigurationError: The "dnspython" module must be installed to use mongodb+srv:// URIs

 Scrapyinghub.yml

projects:
  default: 12345
requirements:
  file: Pipfile
stacks:
  default: scrapy:1.6-py3

Pipfile

[[source]]
name = "pypi"
url = "https://pypi.org/simple"
verify_ssl = true

[dev-packages]
black = "*"
flake8 = "*"
flake8-blind-except = "*"
flake8-bugbear = "*"
flake8-builtins = "*"
flake8-debugger = "*"
flake8-print = "*"
flake8-quotes = "*"
flake8-variables-names = "*"
pep8-naming = "*"
shub = "*"

[packages]
scrapy = "*"
w3lib = "*"
pymongo = "*"
sendgrid = "*"
python-dotenv = "*"
fake-useragent = "*"
money-parser = "*"
scrapy-splash = "*"

[requires]
python_version = "3.7"

[scripts]
lint = "flake8 scraper"
format = "black scraper --line-length 120"

[pipenv]
allow_prereleases = true