old_contents: from setuptools import setup, find_packages
  
  setup(name='citrination-client',
        version='4.6.0',
        url='http://github.com/CitrineInformatics/python-citrination-client',
        description='Python client for accessing the Citrination api',
        packages=find_packages(exclude=('docs')),
        install_requires=[
            'requests<3',
            'pypif',
            'six<2',
            'pyyaml'
        ],
        extras_require={
          "dev": [
            'sphinx_rtd_theme',
            'sphinx',
          ],
          "test": [
            'requests_mock',
            'pytest',
          ]
        })
  
new_contents: from setuptools import setup, find_packages
  
  setup(name='citrination-client',
        version='4.6.0',
        url='http://github.com/CitrineInformatics/python-citrination-client',
        description='Python client for accessing the Citrination api',
        packages=find_packages(exclude=('docs')),
        install_requires=[
            'requests>=2.20.0<3',
            'pypif',
            'six<2',
            'pyyaml'
        ],
        extras_require={
          "dev": [
            'sphinx_rtd_theme',
            'sphinx',
          ],
          "test": [
            'requests_mock',
            'pytest',
          ]
        })
  
subject: Update requests to address security concern