diff --git a/nox.py b/noxfile.py
similarity index 80%
rename from nox.py
rename to noxfile.py
index 980f2a8..26668e8 100644
--- a/nox.py
+++ b/noxfile.py
@@ -23,19 +23,21 @@ def lint(session):
     Returns a failure if flake8 finds linting errors or sufficiently
     serious code quality issues.
     """
-    session.interpreter = 'python3'
     session.install('flake8')
     session.run('flake8',
                 'pypadges,tests')
 
 
-@nox.session
-def unit(session):
+@nox.session(python=['3.4', '3.5', '3.6', '3.7'])
+@nox.parametrize('pip_installs',
+                 [[], ['Jinja2==2.9.0', 'Pillow==5.0.0', 'requests==2.9.0']])
+def unit(session, pip_installs):
     """Run the unit test suite."""
-    session.interpreter = 'python3'
 
     session.install('-e', '.[dev]')
-    # Run py.test against the unit tests.
+    for package in pip_installs:
+        session.install(package)
+
     session.run(
         'py.test',
         '--quiet',
diff --git a/setup.py b/setup.py
index 6092576..9dd20b5 100644
--- a/setup.py
+++ b/setup.py
@@ -41,7 +41,7 @@ def get_long_description():
 
 setup(
     name='pybadges',
-    version='1.1.0',
+    version='2.0.0',
     author='Brian Quinlan',
     author_email='brian@sweetapp.com',
     classifiers=[
@@ -54,6 +54,7 @@ setup(
         'Programming Language :: Python :: 3.4',
         'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
+        'Programming Language :: Python :: 3.7',
         'Operating System :: OS Independent',
     ],
     description='A library and command-line tool for generating Github-style ' +
@@ -63,11 +64,11 @@ setup(
                                'default-widths.json']},
     long_description=get_long_description(),
     long_description_content_type='text/markdown',
-    python_requires='>=3',
-    install_requires=['Jinja2>=2', 'requests>=2.21'],
+    python_requires='>=3.4',
+    install_requires=['Jinja2>=2.9.0,<3', 'requests>=2.9.0,<3'],
     extras_require={
-        'pil-measurement': ['Pillow>=5'],
-        'dev': ['fonttools>=3.26', 'nox-automation>=0.19', 'Pillow>=5',
+        'pil-measurement': ['Pillow>=5,<6'],
+        'dev': ['fonttools>=3.26', 'nox', 'Pillow>=5',
                 'pytest>=3.6'],
     },
     license='Apache-2.0',