old_contents: #!/usr/bin/env python
  from setuptools import find_packages, setup
  
  
  def get_version():
      with open('stix2/version.py') as f:
          for line in f.readlines():
              if line.startswith("__version__"):
                  version = line.split()[-1].strip('"')
                  return version
          raise AttributeError("Package does not have a __version__")
  
  
  install_requires = [
      'pytz',
      'six',
      'python-dateutil',
      'requests',
  ]
  
  setup(
      name='stix2',
      description="Produce and consume STIX 2 JSON content",
      version=get_version(),
      packages=find_packages(),
      install_requires=install_requires,
      keywords="stix stix2 json cti cyber threat intelligence",
  )
  
new_contents: #!/usr/bin/env python
  from setuptools import find_packages, setup
  
  
  def get_version():
      with open('stix2/version.py') as f:
          for line in f.readlines():
              if line.startswith("__version__"):
                  version = line.split()[-1].strip('"')
                  return version
          raise AttributeError("Package does not have a __version__")
  
  
  install_requires = [
      'pytz',
      'six',
      'python-dateutil',
      'requests',
      'simplejson',
  ]
  
  setup(
      name='stix2',
      description="Produce and consume STIX 2 JSON content",
      version=get_version(),
      packages=find_packages(),
      install_requires=install_requires,
      keywords="stix stix2 json cti cyber threat intelligence",
  )
  
subject: Add simplejson dependency.